launching OpenAI o3-pro—available now for Pro users in ChatGPT

June 10, 2025
Today, we're launching OpenAI o3-pro—available now for Pro users in ChatGPT and in our API.

Like o1-pro, o3-pro is a version of our most intelligent model, o3, designed to think longer and provide the most reliable responses. Since the launch of o1-pro, users have favored this model for domains such as math, science, and coding—areas where o3-pro continues to excel, as shown in academic evaluations. Like o3, o3-pro has access to tools that make ChatGPT useful—it can search the web, analyze files, reason about visual inputs, use Python, personalize responses using memory, and more. Because o3-pro has access to tools, responses typically take longer than o1-pro to complete. We recommend using it for challenging questions where reliability matters more than speed, and waiting a few minutes is worth the tradeoff.

In expert evaluations, reviewers consistently prefer o3-pro over o3 in every tested category and especially in key domains like science, education, programming, business, and writing help. Reviewers also rated o3-pro consistently higher for clarity, comprehensiveness, instruction-following, and accuracy.

Academic evaluations show that o3-pro consistently outperforms both o1-pro and o3.

To assess the key strength of o3-pro, we once again use our rigorous "4/4
reliability" evaluation, where a model is considered successful only if it correctly answers a question in all four attempts, not just one:

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o3-pro is available in the model picker for Pro and Team users starting today, replacing o1-pro. Enterprise and Edu users will get access the week after.

As o3-pro uses the same underlying model as o3, full safety details can be found in the o3 system card.

Limitations
At the moment, temporary chats are disabled for o3-pro as we resolve a technical issue.

Image generation is not supported within o3-pro—please use GPT-4o, OpenAI o3, or OpenAI o4-mini to generate images.

Canvas is also currently not supported within o3-pro.