OpenAI: o1

OpenAI o1 is a paid reasoning model from OpenAI that accepts text, images, and files, with a 200,000-token context window and up to 100,000 tokens of completion per request. It supports tool use and has reasoning enabled, giving it the ability to work through multi-step problems before producing output. Structured output support is unconfirmed from available data. At $15.00 per million input tokens and $60.00 per million output tokens, it sits at the expensive end of the market, so cost-sensitive teams should weigh that carefully. Its blended benchmark score of 56.4 covers only three benchmarks, which limits how confidently you can generalize its performance, though its coding scores are notably stronger than its broader AI index result. It is worth shortlisting for users who need deep reasoning over long documents or multimodal inputs and have the budget to match.