OpenAI announced the launch of o3-pro, a refined version of its highly capable o3 model, now available to Pro and Team users through ChatGPT and the OpenAI API. Tailored for complex tasks requiring precision, o3-pro builds on the strengths of its predecessor, o1-pro, and delivers enhanced performance across a range of domains, including math, science, coding, and beyond.

What Sets o3-pro Apart

Like o1-pro, o3-pro is designed to prioritize thoughtful, reliable responses over speed, making it ideal for challenging questions where accuracy is paramount. It leverages the same toolset as o3, enabling web searches, file analysis, visual reasoning, Python execution, personalized responses via memory, and more. However, this tool integration means responses may take a few minutes to generate—a worthwhile tradeoff for users tackling intricate problems.

In expert evaluations, o3-pro outperformed both o3 and o1-pro across all tested categories, with particularly strong results in science, education, programming, business, and writing assistance. Reviewers praised its clarity, comprehensiveness, adherence to instructions, and accuracy, consistently favoring o3-pro over its counterparts.

Academic benchmarks further underscore its capabilities, with o3-pro surpassing o1-pro and o3 in rigorous testing. OpenAI’s “4/4 reliability” evaluation, which requires a model to answer correctly in all four attempts, highlights o3-pro’s consistency, cementing its role as a dependable tool for high-stakes queries.

Availability and Access

Currently, o3-pro is accessible via the model picker for Pro and Team users, replacing o1-pro. Enterprise and Edu users will gain access the following week. As o3-pro shares the same underlying architecture as o3, its safety profile is detailed in the o3 system card, ensuring transparency for users.

Current Limitations

While o3-pro offers significant advancements, it has a few temporary constraints. Image generation is not supported, and users are directed to GPT-4o, o3, or o4-mini for such tasks. The Canvas feature is also unavailable within o3-pro at this time. Additionally, a technical issue has disabled temporary chats, though OpenAI is working to resolve this promptly.

The launch of o3-pro reflects OpenAI’s commitment to refining its AI models for specialized, high-impact use cases. By focusing on reliability and versatility, o3-pro offers Pro users a powerful tool for tackling complex challenges across diverse fields. As OpenAI continues to iterate, this model sets a new standard for thoughtful, accurate AI assistance.