OpenAI · OpenAI (GPT / ChatGPT)
o3-pro
ActiveReleased 1 year ago· Apr 1, 2025Multimodal model
Maximum-reasoning o-series variant with no reasoning-time constraints ($20/$80 per 1M).
- API string
- o3-pro
- Context window
- 200K ctx
- Tier
- Reasoning
- Released
- Apr 1, 2025
Release & change timeline
1 event- Release
o3-pro released
Maximum-reasoning o-series variant with unconstrained reasoning time.
Part of the OpenAI (GPT / ChatGPT) version timeline. Catch Me Up — everything that changed across AI & smart home ↗