o3

Apr 2025
o3
Compare in
on
—per task?
$2 / $8per 1M in / outcache $0.50
126 tok/sfirst token in 16 s?
200Kcontext

Rankingin thinking mode?

Alternatives?

History

3 versions
161820Jan 25Apr 25Release dateAA Intelligence Index 4.3.213
161820Jan 25Apr 25Release dateAA Intelligence Index 4.3.213

Benchmarks

all categories
Chat & Knowledge
GPQA Diamond82.7#101
Coding
Agents & Tool Use
Writing & Language
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 o1?›

On AA Intelligence Index 4.3.2, o3 scores 20.2 vs 15.2 — higher.

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 MiMo v2.6 Pro.

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?›

Muse Spark 1.3 (cheaper), GPT-5.6 Luna (better), MiMo v2.6 Pro (open weights).