ChatGPTProduct changeConfirmed
ChatGPTOpenAI added Ultrafast mode for GPT-6.1 Sol in the Responses API.
- Developers use gpt-6.1-sol with service_tier set to "ultrafast" to reduce the time between generated output tokens.
- It has global processing and US and EU data residency.
- OpenAI's changelog points to separate Ultrafast pricing; the price is not stated in the changelog entry.
- Who can use it
- All API users, subject to rate limits.
- When
- Announced October 8, 2026 in the OpenAI API changelog. Available now.
OpenAI API changelog Announced
