https://openai.com/index/openai-o3-mini
OpenAI o3-mini is our first small reasoning model that supports highly requested developer features including function calling(opens in a new window), Structured Outputs(opens in a new window), and developer messages(opens in a new window), making it production-ready out of the gate.
o3-mini does not support vision capabilities, so developers should continue using OpenAI o1 for visual reasoning tasks.
ChatGPT Plus, Team, and Pro users can access OpenAI o3-mini starting today, with Enterprise access coming in February. o3-mini will replace OpenAI o1-mini in the model picker, offering higher rate limits and lower latency, making it a compelling choice for coding, STEM, and logical problem-solving tasks.
As part of this upgrade, we’re tripling the rate limit for Plus and Team users from 50 messages per day with o1-mini to 150 messages per day with o3-mini.
Starting today, free plan users can also try OpenAI o3-mini by selecting ‘Reason’ in the message composer or by regenerating a response. This marks the first time a reasoning model has been made available to free users in ChatGPT.
![](https://www.pixelsham.com/wp-content/uploads/2025/02/openai_o3_math.jpg)
![](https://www.pixelsham.com/wp-content/uploads/2025/02/openai_o3_phd.jpg)
![](https://www.pixelsham.com/wp-content/uploads/2025/02/openai_o3_code.jpg)