OpenAI
o3
Deliberate o-series reasoner for hard math, coding, and multi-step analysis
Model facts
- Context window
- 2K tokens
- Maximum output
- 1K tokens
- Cheapest paid input
- $1 per 1M tokens
- Cheapest paid output
- $4 per 1M tokens
- Open weights
- no
- Providers
- 20
Capabilities and modalities
reasoning, tool calling, structured output, attachments, temperature control, text, image, pdf.
Artificial Analysis benchmarks
Compare this model on the full LLM benchmark leaderboard.
| Configuration | AAI | Coding | Math | Output tokens/s |
|---|---|---|---|---|
| default | 31.1 | not measured | 88.3 | 128.7 |
Observed price history
- 2026-08-24: $1 input / $4 output per 1M tokens
- 2026-08-28: $1.8 input / $7.2 output per 1M tokens
- 2026-08-31: $1 input / $4 output per 1M tokens
API providers
- OpenRouter (batch) — model id openai/o3:batch; $1 input / $4 output per 1M tokens; provider documentation
- Poe — model id openai/o3; $1.8 input / $7.2 output per 1M tokens; provider documentation
- Abacus — model id o3; $2 input / $8 output per 1M tokens; provider documentation
- Azure — model id o3; $2 input / $8 output per 1M tokens; provider documentation
- Azure Cognitive Services — model id o3; $2 input / $8 output per 1M tokens; provider documentation
- Cloudflare AI Gateway — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- DevPass (LLM Gateway) — model id o3; $2 input / $8 output per 1M tokens; provider documentation
- Eden AI — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- Impossibl — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- Kilo Gateway — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- LLM Gateway (Azure) — model id azure/o3; $2 input / $8 output per 1M tokens; provider documentation
- LLM Gateway (OpenAI) — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- Merge Gateway — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- NEAR AI Cloud — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- OpenAI — model id o3; $2 input / $8 output per 1M tokens; provider documentation
- OpenRouter — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- Vercel AI Gateway — model id openai/o3; $2 input / $8 output per 1M tokens; provider documentation
- Vercel AI Gateway (Fast) — model id openai/o3-fast; $3.5 input / $14 output per 1M tokens; provider documentation
- Jiekou.AI — model id o3; $10 input / $40 output per 1M tokens; provider documentation
- AnyAPI — model id openai/o3; not published input / not published output per 1M tokens; provider documentation