OpenAI makes Decisions API generally available for GPT-6 Luna
The Decisions API is generally available with gpt-6-luna. Requests can include up to 400 questions, up from 200 in public beta, and support shared-input caching, images in question instructions, and structured data through input_json.
- Context
- 1.05M
- Max output
- 128K
- Input price
- $0.10
- Knowledge cutoff
- May 2026
Source: OpenAI API changelog, checked Oct 22, 2026. Summarized from the provider’s announcement.