SOURCE-LINKED INTELLIGENCE

Codex CLI Release: Python SDK 0.154.0

OpenAI ChatGPT & Codex Changelog · article · Sep 10, 2026 · UTC

Install with pip install --upgrade openai-codex==0.154.0 (Python 3.10 or later). This release includes the matching openai-codex-cli-bin==0.154.0 runtime. Add max and ultra reasoning-effort values. #39662 Add ExternalMessage to synchronous and asynchronous run() and turn() calls. External content can start a turn or join an active regular turn with tool-level authority; it does not grant user authorization. Consumers receive independent event streams. #44086 Add includeturns on resume/fork, turnservicetier for one newly started turn, and source metadata. History selection changes the returned response, not model context. Existing defaults are preserved when these options are omitted. #44084 Refresh generated protocol models and notifications, and preserve completion events that arrive before a turn-start response. #44032 , #44400 Check these migrations when upgrading: HookMetadata wraps its handler in .root . Replace accesses such as hook.command with hook.root.command , checking hook.root.handlertype before reading handler-specific fields. Some previously unknown notifications now have typed payloads. Read named fields instead of .params ; unknown or invalid payloads still use Unk

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