OpenAI: o3 Deep Research

OpenAI's o3 Deep Research 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 per completion. It supports tool use and reasoning, giving it the ability to work through multi-step tasks rather than returning a single-pass response. Structured output support is unconfirmed in available specifications. The pricing runs $10.00 per million input tokens and $40.00 per million output tokens, placing it at the higher end of the market. There is currently no independent benchmark coverage to evaluate its performance against peers, so buyers cannot lean on scored comparisons when making a decision. It is best suited for teams that specifically need long-context, reasoning-capable processing with file and image support and are willing to pay a premium while accepting that third-party performance validation is still pending.