What the evidence says
- Developer
- OpenAI
- Released
- December 5, 2024
- Domains
- Language · Mathematics · Multimodal
- Tasks
- Code generation · Language modeling/generation · Quantitative reasoning · Chat · Question answering · Translation · Mathematical reasoning
- Access
- API access
- Weights
- Closed weights
Platform facts
OpenRouter's platform listing, retrieved July 22, 2026. Routed platform prices, not first-party provider prices.
- Input price
- $15.00 per 1M tokens
- Output price
- $60.00 per 1M tokens
- Context length
- 200,000 tokens
- Listed on OpenRouter
- December 17, 2024
Common questions
What is o1?
o1 is a OpenAI model released December 5, 2024, according to Epoch AI's reviewed catalog record. The record classifies it under language, mathematics, multimodal.
How does o1 rank on LMArena?
No board Model Gauntlet mirrors currently lists this exact model revision under a reviewed identity, so no rating is reported here.
What does o1 cost?
OpenRouter lists it at $15.00 per million input tokens and $60.00 per million output tokens, retrieved July 22, 2026. Those are the platform's routed prices, not first-party provider prices.