Codex gets an Ultrafast mode for GPT-6.1 Sol, limited to the $500 Pro plan and eligible business plans

The entry says Ultrafast mode speeds up token generation with GPT-6.1 Sol in Codex and ChatGPT Work. It is available on the Pro plan at $500 and on eligible Enterprise and Edu plans. Enterprise access is off by default, and workspace owners must turn it on. The entry says GPT-6.1 Sol Ultrafast supports inference residency in the United States and Europe (EEA and Switzerland). It gives no speedup figure and points to separate pages for usage and credit rates, which we did not read.

Why it matters: Generation speed is now a plan-gated option for this agent. Without a published speedup or credit rate, the only way to know whether it pays for itself is to time it on your own loop.