OpenAI Announces Release of 'o3-mini' Reasoning Model

OpenAI has announced the release of o3-mini, its newest most cost-efficient reasoning model, available in ChatGPT and the API.

Previewed in December 2024⁠, this powerful and fast model advances the boundaries of what small models can achieve, delivering exceptional STEM capabilities—with particular strength in science, math, and coding—all while maintaining the low cost and reduced latency of OpenAI o1-mini.

OpenAI o3-mini supports highly requested developer features including function calling⁠, Structured Outputs, and developer messages, making it production-ready out of the gate. Like OpenAI o1-mini and OpenAI o1-preview, o3-mini will support streaming⁠. Also, 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. o3-mini does not support vision capabilities, so developers should continue using OpenAI o1 for visual reasoning tasks. o3-mini is rolling out in the Chat Completions API, Assistants API, and Batch API starting today to select developers in API usage tiers 3-5⁠.




Availability
ChatGPT Plus, Team, and Pro users can access OpenAI o3-mini starting today, with Enterprise access coming in a week. 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, OpenAI is 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 the company works to integrate search across our reasoning models.

Free plan users can also try OpenAI o3-mini by selecting 'Reason' in the message composer or by regenerating a response. This is the first time a reasoning model has been made available to free users in ChatGPT.

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.


For more details check out the full announcement at the link below...

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