153141–164Index score#53 of 229 models
4/ 8Core tests taken4 of 6 areas · plus 8 anchor tests
−18Versus the frontier at releasebest then: GPT-5.4Replaced by GLM-5.2 $0.96/ $3.03Price per million tokensinput / output, list price
205KContext windowtokens it reads at once
Where it sitson the frontier
GPT-5 reached this score 8 months earlier.
Test resultsby area · tick = best by any model
Reasoning & knowledgeevidence
Humanity's Last Examno result Novel problemsno evidence yet
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.