144133–155Index score#76 of 229 models
4/ 8Core tests taken3 of 6 areas · plus 8 anchor tests
−26Versus the frontier at releasebest then: GPT-5.3-CodexReplaced by GLM-5.1 $0.60/ $1.92Price per million tokensinput / output, list price
205KContext windowtokens it reads at once
Where it sitson the frontier
o3 reached this score 10 months earlier.
Test resultsby area · tick = best by any model
Reasoning & knowledgeevidence
Humanity's Last Examno result Mathsevidence
FrontierMath T1-3no 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.