Developers Suspect OpenAI of Silently Tweaking API Models

Developers are questioning whether OpenAI silently swaps or adjusts models behind existing API versions, citing drifting outputs after weeks of stable prompts and noticeably weaker Codex follow-through after a recent postmortem.

2026-08-27 ~ 2026-08-28 · 2 related posts

• Dev reports OpenAI silently updated model behind an API version, output drifted — ClickOk5811 · 2026-08-27
• Did OpenAI quietly nerf Codex persistence after its postmortem? — zats · 2026-08-28