The Model Index
Models/OpenAI

o1

OpenAIReleased 5 Dec 2024ClosedReasoning
136124–147Index score#102 of 229 modelsPro mode: 131 · $150 / $600
4/ 8Core tests taken3 of 6 areas · plus 15 anchor tests
FrontierVersus the frontier at releaseset or matched the recordReplaced by o3
$15/ $60Price per million tokensinput / output, list price
200KContext windowtokens it reads at once

Where it sitson the frontier

Among the first models to reach this score.

Test resultsby area · tick = best by any model

Reasoning & knowledgeevidence
GPQA Diamond
77%
Humanity's Last Exam
8%
Mathsevidence
FrontierMath T1-3
15%
Codingevidence
SWE-bench Verified
no result
Terminal-Bench
no result
Agentsevidence
APEX-Agents
no result
Novel problemsevidence
ARC-AGI-2
no result
Long tasksevidence
METR time horizon
39 min

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

The Model Indexindependent tests, our method#102of 219 · 136

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 o3; 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.

Where to use itprices checked 1 Oct 2026

API providers 1 · per million tokens, in / out

OOpenAI$15 / $60cheapest

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

Facts and sources

Released5 Dec 2024
Announcementnot linked yet
Release entryo1 (full) + o1 pro
Scored aso1
Artificial Analysis index–
Pro modeindex 131 · $150 / $600 per M
Output speed–
Hugging Faceclosed weights

OpenAI releasesaround this one