GPT-5.6 Sol
Frontier reasoning LLM for complex professional work, long context, and full tool-using workflows
Available via OpenAI-compatible API
GPT-5.6 Sol
Frontier reasoning LLM for complex professional work, long context, and full tool-using workflows
Available via OpenAI-compatible API
GPT-5.6 Sol Overview
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 family and the target behind the unsuffixed `gpt-5.6` alias. It is positioned for complex professional work, combining OpenAI's highest reasoning tier in this family with a 1,050,000 token context window, 128,000 max output tokens, image input support, structured outputs, function calling, and the full Responses API tool stack for demanding coding, research, and agent workflows.
Token based
Input / 1M tokens (<= 272k input tokens)$5.00
Output / 1M tokens (<= 272k input tokens)$30.00
Cached input / 1M tokens (<= 272k input tokens)$0.50
Commercial use