OpenAI Codex CLI Update: Prompt Presets, Enterprise MCP Sign-In, Faster Calls and Cache Fixes

Key Info

OpenAI's Tibo posted Day 19 small updates for Codex, covering faster call connections, cache behavior when changing reasoning mid-conversation, and a batch of Codex CLI improvements.

Highlights

• Calls connect much faster for dots.
• Changing reasoning in Codex and Work mid-conversation no longer invalidates the cache.
• Codex CLI adds reusable prompt presets, inline model and permission settings, and enterprise MCP sign-in.
• Fixed failures when resuming long sessions and added Windows corporate-proxy authentication.
• CLI usage has grown 2X since DevDay.