OpenAI has launched o3-pro, an AI model that the company claims is its most capable yet. “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,” OpenAI writes in a changelog. “Reviewers also rated o3-pro consistently higher for clarity, comprehensiveness, instruction-following, and accuracy.” O3-pro has access to tools, according to OpenAI, allowing it to search the web, analyze files, reason about visual inputs, use Python, personalize its responses leveraging memory, and more. As a drawback, the model’s responses typically take longer than o1-pro to complete, according to OpenAI. O3-pro has other limitations. Temporary chats with the model in ChatGPT are disabled for now while OpenAI resolves a “technical issue.” O3-pro can’t generate images. And Canvas, OpenAI’s AI-powered workspace feature, isn’t supported by o3-pro. On the plus side, o3-pro achieves impressive scores in popular AI benchmarks. On AIME 2024, which evaluates a model’s math skills, o3-pro scores better than Google’s top-performing AI model, Gemini 2.5 Pro. O3-pro also beats Anthropic’s recently released Claude 4 Opus on GPQA Diamond, a test of PhD-level science knowledge. O3-pro is priced at $20 per million input tokens and $80 per million output tokens in the API. Input tokens are tokens fed into the model, while output tokens are tokens that the model generates based on the input tokens.