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AI models
anthropic

Claude Fable 5.1

AI model Released

API mode
Chat*
Context window
1,000,000 tokens
Maximum output
128,000 tokens
Open weights
No

Capability & preference

General capability · ECI

A cross-benchmark capability estimate. Index points, not a percentage; intervals show uncertainty.

Claude Fable 5.1 166.4* Claude Fable 5.1 · 95% interval 163.6–170.8

Human preference · Arena

Overall text preferences from head-to-head votes. Not factual accuracy or a task-success rate.

Claude Fable 5.1 1513.8 Claude Fable 5.1 (Max) · 95% interval 1508.0–1519.6 · 17,178 votes · 2026-10-28

Model performance

Radar task score: four tests, equal weight. An experimental summary of these tasks, not a universal intelligence rating.

Claude Fable 5.1

Radar task score

Unrated

3/4 core tests · not enough evidence

7 benchmark results for this configuration

Scientific reasoning

GPQA Diamond · 25%

Expert-written science questions; strict multiple-choice scoring. Chance accuracy is 25%.

Claude Fable 5.1 Not available

Novel problem solving

Mystery Game Puzzles · 25%

Best-next-move puzzles in an undisclosed game variant. A narrow reasoning test, not general intelligence.

Claude Fable 5.1 58.0*% Approx. 95% interval: 48.3–67.7%

Advanced mathematics

FrontierMath Tiers 1-3 · 25%

Private v2 mathematics problems with Python tools. Earlier versions and Tier 4 are excluded.

Claude Fable 5.1 90.2*% Approx. 95% interval: 86.7–93.6%

Factual answers

SimpleQA Verified · 25%

Correct factual answers under a guessing prompt, graded by a model. Not a hallucination or abstention score.

Claude Fable 5.1 70.8*% Approx. 95% interval: 68.0–73.6%

Competition mathematics

OTIS Mock AIME 2024-2025 · Separate result

Competition problems with model-extracted answers checked against an exact key. Earlier grading procedures are excluded.

Claude Fable 5.1 100.0*% Uncertainty not available

Research mathematics

FrontierMath Tier 4 v2 · Separate result

The hardest private FrontierMath problems, corrected v2 set, with Python tools. Separate from Tiers 1-3 in the core score.

Claude Fable 5.1 87.8*% Approx. 95% interval: 77.7–97.9%

Visual spatial reasoning

Furniture Assembly · Separate result

Assembly-error detection from photos and manuals, with zoom and Python tools. Uses model-assisted grading; not a general vision score.

Claude Fable 5.1 70.0*% Approx. 95% interval: 58.8–81.2%

Long-horizon computer use

SpireClimb · Separate result

Equally weighted win rates in two Slay the Spire games via screenshots and controls. Fixed game versions; not a general desktop success rate.

Claude Fable 5.1 2.0*% Approx. 95% interval: 0.0–4.2%

Bars show reported task scores. Whiskers are approximate 95% intervals where standard errors are available. Different reasoning budgets are not equal-cost tests. Missing results are never zero.

Recorded results

Only the same benchmark, version, workload, scenario and unit share a row. Missing results are not zero. System results include the full submitted hardware and software configuration.

Arena text preference / chinesehuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,581.30 rating

Confidence interval: 1,564.31 – 1,598.29

1347 votes

Category
chinese
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / codinghuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,530.13 rating

Confidence interval: 1,519.50 – 1,540.76

3403 votes

Category
coding
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / creative_writinghuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,512.05 rating

Confidence interval: 1,501.32 – 1,522.77

3884 votes

Category
creative_writing
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / englishhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,507.85 rating

Confidence interval: 1,500.05 – 1,515.66

6916 votes

Category
english
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / exclude_tieshuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,535.34 rating

Confidence interval: 1,527.74 – 1,542.95

12723 votes

Category
exclude_ties
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / experthuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,544.91 rating

Confidence interval: 1,529.05 – 1,560.77

1497 votes

Category
expert
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / frenchhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,520.97 rating

Confidence interval: 1,495.49 – 1,546.45

608 votes

Category
french
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / germanhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,495.55 rating

Confidence interval: 1,462.48 – 1,528.61

322 votes

Category
german
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / hard_promptshuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,529.00 rating

Confidence interval: 1,522.07 – 1,535.92

9970 votes

Category
hard_prompts
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / hard_prompts_englishhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,523.37 rating

Confidence interval: 1,513.43 – 1,533.31

4035 votes

Category
hard_prompts_english
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_business_and_management_and_financial_operationshuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,493.88 rating

Confidence interval: 1,482.86 – 1,504.91

3066 votes

Category
industry_business_and_management_and_financial_operations
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_entertainment_and_sports_and_mediahuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,498.61 rating

Confidence interval: 1,488.62 – 1,508.60

4381 votes

Category
industry_entertainment_and_sports_and_media
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_legal_and_governmenthuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,512.64 rating

Confidence interval: 1,496.14 – 1,529.14

1398 votes

Category
industry_legal_and_government
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_life_and_physical_and_social_sciencehuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,534.57 rating

Confidence interval: 1,523.04 – 1,546.10

2869 votes

Category
industry_life_and_physical_and_social_science
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_mathematicalhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,543.79 rating

Confidence interval: 1,524.38 – 1,563.20

952 votes

Category
industry_mathematical
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_medicine_and_healthcarehuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,535.14 rating

Confidence interval: 1,518.11 – 1,552.16

1308 votes

Category
industry_medicine_and_healthcare
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_software_and_it_serviceshuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,529.04 rating

Confidence interval: 1,520.52 – 1,537.55

5644 votes

Category
industry_software_and_it_services
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / industry_writing_and_literature_and_languagehuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,513.89 rating

Confidence interval: 1,504.43 – 1,523.35

4937 votes

Category
industry_writing_and_literature_and_language
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / instruction_followinghuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,518.68 rating

Confidence interval: 1,509.60 – 1,527.77

5162 votes

Category
instruction_following
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / japanesehuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,562.02 rating

Confidence interval: 1,526.57 – 1,597.47

329 votes

Category
japanese
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / koreanhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,513.61 rating

Confidence interval: 1,476.46 – 1,550.77

264 votes

Category
korean
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / longer_queryhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,525.38 rating

Confidence interval: 1,517.29 – 1,533.47

7062 votes

Category
longer_query
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / mathhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,530.99 rating

Confidence interval: 1,510.84 – 1,551.14

835 votes

Category
math
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / multi_turnhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,495.38 rating

Confidence interval: 1,482.44 – 1,508.31

2293 votes

Category
multi_turn
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / non_englishhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,509.65 rating

Confidence interval: 1,502.83 – 1,516.47

10256 votes

Category
non_english
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / overallhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,513.83 rating

Confidence interval: 1,508.03 – 1,519.64

17178 votes

Category
overall
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / polishhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,535.76 rating

Confidence interval: 1,500.92 – 1,570.59

270 votes

Category
polish
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / russianhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,521.14 rating

Confidence interval: 1,507.95 – 1,534.34

2256 votes

Category
russian
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference
Arena text preference / spanishhuman preference · 2026-10-28 · rating

Claude Fable 5.1

1,517.81 rating

Confidence interval: 1,493.63 – 1,542.00

568 votes

Category
spanish
Evaluated configuration
Claude Fable 5.1 (Max)
Evaluation type
human preference

Run it locally

Inference · memory estimate

Claude Fable 5.1

Closed weights. No supported local deployment or GPU requirement is published.

API cost

USD / month

Standard text-token estimate. Excludes taxes, caching, batch discounts, reasoning and multimodal surcharges. Provider limits and regional availability may differ.

Claude Fable 5.1

Claude Fable 5.1 / Pricing tiers 6
Provider / scopeRateCurrencyAmount / unit
AnthropicClaude Fable 5.1Batch InputUSD5 / 1M tokens
OutputUSD25 / 1M tokens
AnthropicClaude Fable 5.1Standard Cached inputUSD0.25 / 1M tokens
InputUSD10 / 1M tokens
OutputUSD50 / 1M tokens
AWS BedrockClaude Fable 5.1Standard Global cross-region Cached inputUSD0.25 / 1M tokens
InputUSD10 / 1M tokens
OutputUSD50 / 1M tokens
Google Vertex AIClaude Fable 5.1Batch Token tier: 0 – 200,000 Cached inputUSD0.125 / 1M tokens
InputUSD5 / 1M tokens
OutputUSD25 / 1M tokens
Google Vertex AIClaude Fable 5.1Standard Token tier: 0 – 200,000 Cached inputUSD0.25 / 1M tokens
InputUSD10 / 1M tokens
OutputUSD50 / 1M tokens
Google Vertex AIClaude Fable 5.1Standard Token tier: 200,000 – No stated upper limit Cached inputUSD0.25 / 1M tokens
InputUSD10 / 1M tokens
OutputUSD50 / 1M tokens

Capabilities

Context window
1,000,000 tokens
Maximum input
1,000,000 tokens*
Maximum output
128,000 tokens
Reasoning
Yes
Tool calling
Yes
Structured output
Yes*
Open weights
No
Knowledge cutoff
2026-06
API mode
Chat*
Image input
Yes*
PDF input
Yes*
Prompt caching
Yes*
Tool choice
Yes*
Web search
Yes*
Model license
Proprietary

Input modalities

  • text
  • image
  • pdf

Output modalities

  • text

System configuration

Detailed specifications

Specifications · 69 fields
bedrock output config effort ceiling
xhigh*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache creation input token cost
1.25e-5*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache creation input token cost
1.25e-5*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache creation input token cost above 1hr
2.0e-5*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache creation input token cost above 1hr
2.0e-5*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache creation input token cost batches
6.25e-6*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache read input token cost
2.5e-7*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache read input token cost
2.5e-7*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
cache read input token cost batches
1.25e-7*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
input cost per token
1.0e-5*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
input cost per token
1.0e-5*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
input cost per token batches
5.0e-6*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
litellm provider
anthropic*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
litellm provider
bedrock_converse*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
max input tokens
1,000,000*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
max input tokens
1,000,000*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
max output tokens
128,000*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
max output tokens
128,000*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
max tokens
128,000*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
max tokens
128,000*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
mode
chat*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
mode
chat*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
output cost per token
5.0e-5*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
output cost per token
5.0e-5*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
output cost per token batches
2.5e-5*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
prompt cache min tokens
512*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
prompt cache min tokens
512*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
provider specific entry
us
1.1*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
search context cost per query
search_context_size_high
0.01*
search_context_size_low
0.01*
search_context_size_medium
0.01*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
search context cost per query
search_context_size_high
0.01*
search_context_size_low
0.01*
search_context_size_medium
0.01*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports adaptive thinking
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports adaptive thinking
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports anthropic compaction
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports assistant prefill
No*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports assistant prefill
No*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports computer use
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports computer use
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports forced tool use
No*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports forced tool use
No*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports function calling
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports function calling
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports max reasoning effort
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports max reasoning effort
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports mid conversation system
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports mid conversation system
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports native structured output
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports native structured output
No*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports output config
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports output config
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports parallel tool use config
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports pdf input
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports pdf input
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports prompt caching
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports prompt caching
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports reasoning
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports reasoning
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports response schema
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports response schema
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports sampling params
No*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports sampling params
No*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports tool choice
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports tool choice
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports vision
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports vision
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports web search
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports xhigh reasoning effort
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
supports xhigh reasoning effort
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
thinking always on
Yes*
Scope and conditions
native_context
provider
anthropic*
mode
chat*
full_native_model_id
claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*
thinking always on
Yes*
Scope and conditions
native_context
provider
bedrock_converse*
mode
chat*
full_native_model_id
anthropic.claude-fable-5-1*
pricing_scope
Literal source field names and values retained; provider, region, cache/batch/threshold conditions and per-unit meaning must be checked. max_tokens is not automatically a context limit.*

* Provisional data