OpenAI: o3

OpenAI o3 is a paid model from OpenAI that accepts text, images, and files as input, with a 200,000-token context window and up to 100,000 tokens of output. It supports tool use and reasoning, making it applicable to multi-step tasks that require external calls or extended chains of inference. Structured output support is unconfirmed based on available data. At $2.00 per million input tokens and $8.00 per million output tokens, o3 sits at a moderate price tier, and its blended benchmark score of 77.5 is based on only three benchmarks, so treat that figure as directional rather than definitive. Developers and researchers who need long-context processing, tool integration, and reasoning in a single model are the clearest candidates here; those optimizing for cost or needing broader benchmark validation before committing should compare it against similarly priced alternatives with wider coverage.