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AI models
anthropic

Claude Opus 4.5 (latest)

AI model Released

Context window
200,000 tokens
Maximum output
64,000 tokens
Open weights
No

Model performance

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

Claude Opus 4.5 (latest)

Radar task score

Unrated

3/4 core tests · not enough evidence

5 benchmark results for this configuration

Scientific reasoning

GPQA Diamond · 25%

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

Claude Opus 4.5 (latest) 86.0*% Approx. 95% interval: 82.0–90.1% · Older result

Novel problem solving

Mystery Game Puzzles · 25%

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

Claude Opus 4.5 (latest) Not available

Advanced mathematics

FrontierMath Tiers 1-3 · 25%

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

Claude Opus 4.5 (latest) 34.4*% Approx. 95% interval: 28.9–39.9%

Factual answers

SimpleQA Verified · 25%

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

Claude Opus 4.5 (latest) 45.7*% Approx. 95% interval: 42.6–48.8%

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 Opus 4.5 (latest) 86.1*% Approx. 95% interval: 77.8–94.5% · Older result

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 Opus 4.5 (latest) 4.9*% Approx. 95% interval: 0.0–11.6%

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.

Run it locally

Inference · memory estimate

Claude Opus 4.5 (latest)

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 Opus 4.5 (latest)

Capabilities

Context window
200,000 tokens
Maximum output
64,000 tokens
Reasoning
Yes
Tool calling
Yes
Open weights
No
Knowledge cutoff
2025-05

Input modalities

  • text
  • image
  • pdf

Output modalities

  • text

* Provisional data