OpenAI API changelog
Changelog | OpenAI API
AI summary
OpenAI added an Ultrafast mode for GPT-6.1 Sol in the Responses API, available to all API users but subject to rate limits. Concurrently, it released the Decisions API beta (gpt-6-luna), simplified API usage tiers from five to three tiers—Build, Launch, Grow—and added computer use to the Agents API.