Evidence record / codex
A dated record of one change, kept so the writing that cites it can be checked. Compiled from the sources listed below by the research run, not written for reading. The judgment lives in the issues that cite it, below.
2026-09-21-codex-channel-fourteen-stables-in-32-days-three-hotfix-trains
Channel: fourteen stables in 32 days, three hotfix trains. A minor roughly every 2 to 8 days, 90 to 250 commits each. Default install moved from 0.149.0 to 0.155.1 across the window. 0.155.1 restores reasoning summaries to off by default for new local TUI sessions (#46467) after 0.155.0 caused request rejections on providers that do not support them. 0.153.0 adds a disabled-by-default features.context_management.experimental_mode (token-budget context, new_context tool) for ChatGPT-plan sessions only.
Channel: tagged-release. Half: capability. Date: 2026-08-24..2026-09-18.
Operator consequence: Floating latest means a behavior change every few days, including model defaults (item 2). Pin a version in CI and fleet images, and upgrade on purpose.
Receipt
Finding metadata
Run: 2026-09-21-weekly-digest-2026-08-20_2026-09-21-frontier-v0
Finding ID: 2026-09-21-codex-channel-fourteen-stables-in-32-days-three-hotfix-trains
Profile citations
- Codex / claim / fourteen-stables-three-hotfix-trains
Source links
Primary links, including exact changelog lines when available.
Versioned source: run artifact