OpenAI has released o3-mini, a cost-effective reasoning model that advances the boundaries of what small models can achieve in science, math, and coding. This powerful and fast model is now available in both ChatGPT and the API, with developers supporting highly requested features like function calling, structured outputs, and developer messages.
o3-mini offers exceptional STEM capabilities while maintaining low cost and reduced latency compared to OpenAI o1-mini. Developers can choose between three reasoning effort options – low, medium, and high – to optimize for their specific use cases. This flexibility allows o3-mini to “think harder” when tackling complex challenges or prioritize speed when latency is a concern.
ChatGPT Plus, Team, and Pro users can access OpenAI o3-mini starting today, with Enterprise access coming in February. The model will replace OpenAI o1-mini in the model picker, offering higher rate limits and lower latency. Additionally, o3-mini now works with search to find up-to-date answers with links to relevant web sources.
Free plan users can also try OpenAI o3-mini by selecting ‘Reason’ in the message composer or regenerating a response. This marks the first time a reasoning model has been made available to free users in ChatGPT.
o3-mini uses medium reasoning effort to provide a balanced trade-off between speed and accuracy, while Pro users will have unlimited access to both o3-mini and o3-mini-high for a higher-intelligence version that takes a little longer to generate responses. Evaluations by expert testers showed that o3-mini produces more accurate and clearer answers, with stronger reasoning abilities, than OpenAI o1-mini.
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. The model demonstrates superior results in additional math and factuality evaluations beyond STEM tasks, delivering faster performance and improved efficiency.
Source: https://openai.com/index/openai-o3-mini