OpenAI
o3
Closed SourceProprietary · 200K context window
Quick info
- Provider
- OpenAI
- License
- Proprietary
- Context window
- 200K
- Task type
- text-generation
- LM Arena votes
- 59,742
- Release date
- April 16, 2025
More models from this provider
- gpt-5.51,481
- gpt-5.41,478
- gpt-5.2-chat-latest1,476
- gpt-5.5-instant1,473
- gpt-5.11,455
Description
OpenAI's flagship "o"-series reasoning model, built for hard math, science, and coding tasks. Runs an internal chain-of-thought before responding, which lifts state-of-the-art results on ARC-AGI, GPQA, and Codeforces well beyond non-reasoning models.
LM Arena benchmarks
| Board | Score |
|---|---|
| Text | 1,431 |
| Vision | 1,217 |
Pricing (per 1M tokens)
- Input price
- $2/1M
- Output price
- $8/1M