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. Additionally, o3‑mini now works with search to find up-to-date answers with links to relevant web sources. This is an early prototype as we work to integrate search across our reasoning models.

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.

While OpenAI o1 remains our broader general knowledge reasoning model, OpenAI o3‑mini provides a specialized alternative for technical domains requiring precision and speed. In ChatGPT, o3‑mini uses medium reasoning effort to provide a balanced trade-off between speed and accuracy. All paid users will also have the option of selecting o3‑mini‑high in the model picker for a higher-intelligence version that takes a little longer to generate responses. Pro users will have unlimited access to both o3‑mini and o3‑mini‑high.

Similar to its OpenAI o1 predecessor, OpenAI o3‑mini has been optimized for STEM reasoning. o3‑mini with medium reasoning effort matches o1’s performance in math, coding, and science, while delivering faster responses. Evaluations by expert testers showed that o3‑mini produces more accurate and clearer answers, with stronger reasoning abilities, than OpenAI o1‑mini. Testers preferred o3‑mini's responses to o1‑mini 56% of the time and observed a 39% reduction in major errors on difficult real-world questions. With medium reasoning effort, o3‑mini matches the performance of o1 on some of the most challenging reasoning and intelligence evaluations including AIME and GPQA.