o1

Dec 2024
o1
Compare in
on
—per task?
$15 / $60per 1M in / outcache $7.50
—output speed?
200Kcontext

Rankingin thinking mode?

Strong at

A
Instructions#49 of 245
B
Tool calling#100 of 242Knowledge#101 of 318
C
Reasoning#222 of 334Science#157 of 312Long context#142 of 273

History

3 versions
788082Jan 25Apr 25Release dateMMMU validation13
788082Jan 25Apr 25Release dateMMMU validation13

Benchmarks

all categories
Chat & Knowledge
Humanity's Last Exam7#224
AA Omniscience Index-11.1#101
CritPt (physics)0.3#149
AA Intelligence Index 4.3.2≈15.2#145
AA Omniscience · Accuracy34.5#62
AA Omniscience · Hallucination Rate69.6#132
AA-LCR (long context) 1.165#142
GPQA Diamond74.7#158
Coding
Terminal-Bench Hard (version unstated)12.9#118
LiveCodeBench · AA archived67.9#55
Agents & Tool Use
τ²-bench · AA62.6#102
Writing & Language
IFBench (instructions)70.3#49

FAQ

How much does o1 cost?›

$15 per 1M input tokens and $60 per 1M output tokens; cached input $7.50 per 1M.

Is o1 free to use?›

There is no free API; the cheapest paid price is $15 per 1M input tokens.

How good is o1, and what is it best at?›

#222 of 334 in Chat & Knowledge, #117 of 239 in Coding, #100 of 242 in Agents & Tool Use, #83 of 195 in Writing & Language, #69 of 88 in Vision & Documents. Strongest at: Instructions.

Is o1 better than Qwen3 VL 235B A22B?›

On MMMU · validation, o1 scores 78.2 vs 78.7 — about the same.

How can I use o1?›

Through the API of OpenAI.

What is the context window of o1?›

200K tokens, with up to 100K output tokens.

When was o1 released? Is there a newer version?›

Released 2024-12-05. It has been superseded by o3.

Is o1 open source?›

No, o1 is a closed model available through an API. The closest open-weights option here is Dots.vlm1.inst.

Can o1 read images?›

It accepts text and images, PDF files as input.

What is o1?›

o1 is a closed language model from OpenAI, released Dec 2024.

What are the best alternatives to o1?›

GPT-5.1 (cheaper), Dots.vlm1.inst (open weights).