172161–183Index score#13 of 229 models
4/ 8Core tests taken4 of 6 areas · plus 17 anchor tests
−13Versus the frontier at releasebest then: Claude Fable 5
$0.68/ $10Price per million tokensinput / output, list price
1.05MContext windowtokens it reads at once
Where it sitson the frontier
GPT-5.5 reached this score 3 months earlier.
Test resultsby area · tick = best by any model
Reasoning & knowledgeevidence
Humanity's Last Examno result Codingevidence
SWE-bench Verifiedno result Long tasksno evidence yet
METR time horizonno result Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.