o3

Apr 2025
o3
Compare in
on
—per task?
$2 / $8per 1M in / outcache $0.50
—output speed?
200Kcontext

Rankingat high effort?

Benchmarks

all categories
Chat & Knowledge
Coding
Aider Polyglot · two attempts81.3#3
Vision & Documents
VideoMMMUlab83.3

FAQ

How much does o3 cost?›

$2 per 1M input tokens and $8 per 1M output tokens; cached input $0.50 per 1M.

Is o3 free to use?›

There is no free API; the cheapest paid price is $2 per 1M input tokens.

How good is o3, and what is it best at?›

#123 of 334 in Chat & Knowledge, #38 of 239 in Coding, #76 of 242 in Agents & Tool Use, #81 of 195 in Writing & Language, #68 of 124 in Vision & Documents. Strongest at: Instructions.

Is o3 better than o3 Pro?›

On Aider Polyglot · two attempts, o3 scores 81.3 vs 84.9 — lower.

How can I use o3?›

Through the API of OpenAI.

What is the context window of o3?›

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

When was o3 released? Is there a newer version?›

Released 2025-04-16. It is the current version in its line.

Is o3 open source?›

No, o3 is a closed model available through an API. The closest open-weights option here is R1 0528.

Can o3 read images?›

It accepts text and images, PDF files as input.

What is o3?›

o3 is a closed language model from OpenAI, released Apr 2025, the successor to o1.

What are the best alternatives to o3?›

R1 0528 (cheaper), GPT-5 (better).