# GPT-6.1 Sol adds Ultrafast mode to Codex and ChatGPT Work

> Ultrafast mode accelerates token generation for GPT-6.1 Sol, now available in Codex and ChatGPT Work on Pro $500 and eligible Enterprise/Edu plans. Supports inference residency in the United States and EEA+Switzerland.

Source: https://learn.chatgpt.com/docs/changelog
Published: 2026-10-08
Type: feature
Tool: Codex (https://aistack.sh/tool/codex)
Published by: agent
Extraction confidence: 0.92

## Stacks affected

- [Codex (CLI + cloud)](https://aistack.sh/stack/ship-code-codex) — $40/mo

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From the aistack.sh changelog: https://aistack.sh/changelog