GPT-5.6 model family released

Released the GPT-5.6 model family, including GPT-5.6 Sol for frontier capability, GPT-5.6 Terra for a balance of intelligence and cost, and GPT-5.6 Luna for efficient, high-volume workloads. The gpt-5.6 alias routes requests to gpt-5.6-sol.

GPT-5.6 adds:

• Programmatic Tool Calling
• Explicit prompt caching controls
• Persisted reasoning, max reasoning effort, and Pro mode
• Multi-agent orchestration in beta for the Responses API
• Support for images at their original dimensions with original or auto image detail