What the evidence says
- Developer
- OpenAI
- Released
- December 20, 2024
- Domains
- Language · Vision · Multimodal
- Tasks
- Language modeling/generation · Question answering · Quantitative reasoning · Code generation · Visual question answering · Search · Instruction interpretation · Visual puzzles
- 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
- $2.00 per 1M tokens
- Output price
- $8.00 per 1M tokens
- Context length
- 200,000 tokens
- Listed on OpenRouter
- April 16, 2025
Common questions
What is o3?
o3 is a OpenAI model released December 20, 2024, according to Epoch AI's reviewed catalog record. The record classifies it under language, vision, multimodal.
How does o3 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 o3 cost?
OpenRouter lists it at $2.00 per million input tokens and $8.00 per million output tokens, retrieved July 22, 2026. Those are the platform's routed prices, not first-party provider prices.