o1-pro
Released
o1-pro is an AI model released by OpenAI on Wednesday, Mar 19 2025, 20 days after GPT-4.5.
API pricing
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $150.00
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $600.00
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Frequently asked questions
o1-pro was released by OpenAI on Wednesday, Mar 19 2025.
o1-pro was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
o1-pro costs $150.00 per million input tokens and $600.00 per million output tokens through the OpenAI API. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.
No. o1-pro is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
OpenAI's previous tracked release was GPT-4.5 on Feb 27 2025, 20 days earlier. It was followed by GPT-4.1 on Apr 14 2025.