GPT-6.1 Sol Ultrafast tier

OpenAI: GPT-6.1 Sol Ultrafast tier, Thursday, October 8, 2026, OpenAI API (Responses API), Codex, ChatGPT Work. Ended.

A new Ultrafast service tier for gpt-6.1-sol in the Responses API, priced at $12 per million input tokens and $60 per million output tokens — six times the standard rates. Available to all API users subject to rate limits, with US and EU data residency. Also rolling out in Codex and ChatGPT Work on Pro 500 and eligible Enterprise and Edu plans.