The model arrives in ChatGPT Work, Codex and the API, with standard token prices of $1 input and $5 output per million. Its desktop and coding gains come from OpenAI’s own evaluations.
The GPT-6 Luna endpoint now handles up to 400 questions per request. Its input-based pricing includes discounted cache reads and charged cache writes, while answers carry no output-token fee.
Signed-in users are promised cache hits when returning to old conversations. OpenAI’s website separately documents a new 12-hour caching option for the Responses API.