GPT-6.1 Sol released, with Multi-agent in beta

Released GPT-6.1 Sol (gpt-6.1-sol) for complex coding and professional work at a lower cost than GPT-6 Astra.

Standard pricing per 1M tokens for prompts with up to 272K input tokens is $2 input, $0.10 cached input, $2.50 cache write, and $10 output.

GPT-6.1 Sol also supports Multi-agent in beta. Let the model delegate work to subagents in a Responses API request.

Use the Responses API for tool calling. See GPT-6 model guidance for reasoning settings and pricing for available processing tiers.