GPT-5-Codex

GPT-5-Codex is a version of GPT-5 optimized for agentic coding in Codex. It is the default for cloud tasks and code review, and developers can choose it for local tasks via Codex CLI and the IDE extension.

OpenAI | In Edition 1, Saturday 20 Sep 2025

SOURCE OpenAI, Introducing upgrades to Codex

Added to The Deploy Log Monday 14 Sep 2026, updated Thursday 17 Sep 2026. Read Edition 1, the edition that carried it.

The call on this one

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