158147–170Index score#42 of 229 models
4/ 8Core tests taken4 of 6 areas · plus 11 anchor tests
−11Versus the frontier at releasebest then: GPT-5.3-CodexReplaced by Grok 4.5 $1.25/ $2.5Price per million tokensinput / output, list price
2MContext windowtokens it reads at once
Where it sitson the frontier
Gemini 3 Pro 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.
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 Grok 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.