OpenAI Codex Python SDK 0.154.0 Adds max/ultra Reasoning Efforts, ExternalMessage
aibrahim-oai · ghdev · 2026-09-11
OpenAI released Codex Python SDK 0.154.0 (pip install openai-codex==0.154.0, Python 3.10+). Key changes: new max and ultra reasoning-effort values; ExternalMessage lets external content start or join an active turn with tool-level authority (no user authorization); includeturns on resume/fork, per-turn turnservicetier, and source metadata; typed notification payloads. Migration notes: HookMetadata handlers moved under .root, late-joining turn handles don't replay earlier events (use thread.read(includeturns=True)), and custom codexbin overrides require CLI 0.151.0+.
More from coding & agent
- Agent verified 'success' after double-voting: a lesson in harness vs model bugs — TejasKumar_ · 2026-10-26
- diginomica: agentic automation hype is overdone, and 'The Hackening' of enterprise security has begun — jonerp · 2026-10-26
- 'Vibe verification': ~60% of AI-written formal specs prove the wrong property — basedjensen · 2026-10-26
- Devin launches Security suite powered by Claude Mythos with $100M+ credits — DevinAI · 2026-10-26
- HackBench injects reward hacks into agent trajectories to stress-test monitors — DanielKhashabi · 2026-10-26
- Hugging Face ships hf CLI updates: deduped cache saves 19GB, faster buckets, retryable GPU jobs — yb2698 · 2026-10-26