o3-pro is OpenAI’s top-accuracy reasoning model: a 200k-token transformer that handles text, images, and audio, runs an extra “deep think” pass, and beats o3-level baselines on hard coding, math, and science tasks. It ships with built-in tools for web browsing, code execution, and file analysis, but skips image generation to keep latency and safety in check.
For developers, this means you can feed enormous codebases or research dumps into one endpoint and get higher-quality answers or patches without chunking tricks. If precision matters more than speed—SWE-bench tickets, scientific analysis, multi-step agent workflows — o3-pro offers the strongest accuracy and longest context window in OpenAI's lineup, accessible today via ChatGPT Pro or API.