OpenAI: GPT-5.6 Sol

GPT-5.6 Sol is OpenAI's model for text, image, and file inputs, with a context window of about 1.05 million tokens and up to 128,000 tokens of output per response. It supports tool calling and reasoning, so it can work in agentic workflows and multi-step problem solving. The listing does not confirm structured output support or open weights, so buyers who need either should verify before committing. At $2 per million input tokens and $10 per million output tokens, it is a paid option where output volume will drive most of the cost. That makes it worth shortlisting for teams that need long-context document or codebase work combined with tool use. Its blended score of 80.2 rests on a single independent benchmark, with an AI Index reading of 77.5. That is a thin evidence base, so run your own evaluations against comparably priced models before treating that standing as settled.