GPT-6.1 Sol Ultrafast arrives in Codex, at 8x included usage

What changed

Ultrafast mode speeds up token generation for GPT-6.1 Sol in Codex and ChatGPT Work. It uses included subscription limits at 8x the standard rate, and bills purchased credits and Enterprise pay-as-you-go at 6x. It is available on Pro $500 and eligible Enterprise and Edu plans; for Enterprise it is off until workspace owners enable it. Other self-serve plans can’t use it, even with purchased credits.

Who it affects

Pro $500 subscribers and eligible Enterprise and Edu workspaces on credit-based or usage-based agreements.

What to do

Use Ultrafast only for latency-critical work, since it burns allowance 8x faster. Enterprise owners must enable it in workspace permissions.

Source: https://learn.chatgpt.com/docs/agent-configuration/speed