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AI models
meta

Muse Spark 1.3

AI model Released

API mode
Chat*
Context window
1,048,576 tokens
Maximum output
131,072 tokens
Open weights
No

Capability & preference

General capability · ECI

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

Muse Spark 1.3 157.4* Muse Spark 1.3 · 95% interval 155.4–159.9

Human preference · Arena

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

Muse Spark 1.3 1490.6 Muse Spark 1.3 (Max) · 95% interval 1485.4–1495.8 · 22,134 votes · 2026-10-28

Model performance

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

Muse Spark 1.3

Radar task score

Unrated

2/4 core tests · not enough evidence

3 benchmark results for this configuration

Scientific reasoning

GPQA Diamond · 25%

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

Muse Spark 1.3 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.

Muse Spark 1.3 25.0*% Approx. 95% interval: 16.3–33.7%

Advanced mathematics

FrontierMath Tiers 1-3 · 25%

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

Muse Spark 1.3 74.0*% Approx. 95% interval: 68.9–79.1%

Factual answers

SimpleQA Verified · 25%

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

Muse Spark 1.3 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.

Muse Spark 1.3 46.3*% Approx. 95% interval: 30.9–61.8%

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

Muse Spark 1.3

1,526.28 rating

Confidence interval: 1,511.66 – 1,540.90

1744 votes

Category
chinese
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / codinghuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,509.38 rating

Confidence interval: 1,500.90 – 1,517.87

5707 votes

Category
coding
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / creative_writinghuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,463.87 rating

Confidence interval: 1,454.27 – 1,473.47

4874 votes

Category
creative_writing
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / englishhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,494.22 rating

Confidence interval: 1,487.03 – 1,501.41

8632 votes

Category
english
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / exclude_tieshuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,504.04 rating

Confidence interval: 1,497.05 – 1,511.03

16248 votes

Category
exclude_ties
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / experthuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,510.49 rating

Confidence interval: 1,498.12 – 1,522.85

2392 votes

Category
expert
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / frenchhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,507.58 rating

Confidence interval: 1,484.71 – 1,530.45

748 votes

Category
french
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / germanhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,503.77 rating

Confidence interval: 1,471.41 – 1,536.13

328 votes

Category
german
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / hard_promptshuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,502.54 rating

Confidence interval: 1,496.44 – 1,508.64

14300 votes

Category
hard_prompts
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / hard_prompts_englishhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,499.57 rating

Confidence interval: 1,490.96 – 1,508.19

5548 votes

Category
hard_prompts_english
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_business_and_management_and_financial_operationshuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,486.31 rating

Confidence interval: 1,476.43 – 1,496.19

3980 votes

Category
industry_business_and_management_and_financial_operations
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_entertainment_and_sports_and_mediahuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,458.57 rating

Confidence interval: 1,449.71 – 1,467.44

5723 votes

Category
industry_entertainment_and_sports_and_media
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_legal_and_governmenthuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,496.17 rating

Confidence interval: 1,481.82 – 1,510.52

1819 votes

Category
industry_legal_and_government
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_life_and_physical_and_social_sciencehuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,506.07 rating

Confidence interval: 1,495.62 – 1,516.52

3600 votes

Category
industry_life_and_physical_and_social_science
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_mathematicalhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,492.35 rating

Confidence interval: 1,475.90 – 1,508.79

1301 votes

Category
industry_mathematical
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_medicine_and_healthcarehuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,492.95 rating

Confidence interval: 1,477.22 – 1,508.68

1515 votes

Category
industry_medicine_and_healthcare
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_software_and_it_serviceshuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,508.42 rating

Confidence interval: 1,501.11 – 1,515.72

8240 votes

Category
industry_software_and_it_services
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / industry_writing_and_literature_and_languagehuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,471.02 rating

Confidence interval: 1,462.56 – 1,479.48

6254 votes

Category
industry_writing_and_literature_and_language
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / instruction_followinghuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,477.61 rating

Confidence interval: 1,470.09 – 1,485.13

7871 votes

Category
instruction_following
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / japanesehuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,471.88 rating

Confidence interval: 1,439.88 – 1,503.89

388 votes

Category
japanese
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / koreanhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,493.92 rating

Confidence interval: 1,463.22 – 1,524.63

394 votes

Category
korean
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / longer_queryhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,487.72 rating

Confidence interval: 1,480.60 – 1,494.84

9859 votes

Category
longer_query
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / mathhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,500.69 rating

Confidence interval: 1,483.24 – 1,518.15

1125 votes

Category
math
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / multi_turnhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,487.88 rating

Confidence interval: 1,477.06 – 1,498.69

3324 votes

Category
multi_turn
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / non_englishhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,481.88 rating

Confidence interval: 1,475.70 – 1,488.05

13491 votes

Category
non_english
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / overallhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,490.63 rating

Confidence interval: 1,485.41 – 1,495.84

22134 votes

Category
overall
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / polishhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,491.46 rating

Confidence interval: 1,458.65 – 1,524.27

327 votes

Category
polish
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / russianhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,494.72 rating

Confidence interval: 1,483.39 – 1,506.05

3005 votes

Category
russian
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference
Arena text preference / spanishhuman preference · 2026-10-28 · rating

Muse Spark 1.3

1,487.60 rating

Confidence interval: 1,465.24 – 1,509.95

747 votes

Category
spanish
Evaluated configuration
Muse Spark 1.3 (Max)
Evaluation type
human preference

Run it locally

Inference · memory estimate

Muse Spark 1.3

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.

Muse Spark 1.3

Capabilities

Context window
1,048,576 tokens
Maximum input
1,048,576 tokens*
Maximum output
131,072 tokens
Reasoning
Yes
Tool calling
Yes
Structured output
Yes*
Open weights
No
API mode
Chat*
Image input
Yes*
PDF input
Yes*
Parallel tool calls
Yes*
Prompt caching
Yes*
System messages
Yes*
Tool choice
Yes*
Web search
Yes*
Model license
Proprietary

Input modalities

  • text
  • image
  • video
  • pdf
  • audio

Output modalities

  • text

System configuration

Detailed specifications

Specifications · 24 fields
cache read input token cost
1.5e-7*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
1.25e-6*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
1,048,576*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
131,072*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
131,072*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
4.25e-6*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
0.0025*
search_context_size_low
0.0025*
search_context_size_medium
0.0025*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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.*
supported endpoints
  • /v1/chat/completions*
  • /v1/responses*
  • /v1/messages*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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.*
supported modalities
  • text*
  • image*
  • video*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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.*
supported output modalities
  • text*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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 minimal reasoning effort
Yes*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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 function calling
Yes*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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 system messages
Yes*
Scope and conditions
native_context
provider
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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
meta*
mode
chat*
full_native_model_id
meta/muse-spark-1.3*
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