OpenAI: o1-pro

OpenAI o1-pro is a paid reasoning model from OpenAI that accepts text, image, and file inputs and supports a 200,000-token context window with up to 100,000 completion tokens. It applies extended reasoning to its outputs but does not support tool use, and structured output support is unconfirmed. The large context capacity makes it suited for long-document analysis, and the image and file modalities allow multimodal inputs beyond plain text. At $150 per million input tokens and $600 per million output tokens, this is one of the more expensive options on the market, so cost-sensitive or high-volume users should weigh that carefully. Its blended benchmark score of 30.3 covers only one independent benchmark, giving a limited performance picture. Teams handling complex, long-context reasoning tasks with budget flexibility may find it worth shortlisting, but those needing tool integration or structured outputs will need to look elsewhere.