135123–146Index score#104 of 229 models
4/ 8Core tests taken3 of 6 areas · plus 19 anchor tests
$3.0/ $15Price per million tokensinput / output, list price
200KContext windowtokens it reads at once
Where it sitson the frontier
o1 reached this score 6 months earlier.
Test resultsby area · tick = best by any model
Reasoning & knowledgeevidence
Mathsevidence
FrontierMath T1-3no result Codingevidence
SWE-bench Verifiedno 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.
What others sayrank on each leaderboard
Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.
Best attop three among current models
Replaced by Claude Sonnet 4.5; it no longer leads any category among current models.
Where this model places in the top three of today's models, on category leaderboards and on our core tests.