Codex Swapped Its Default Model and Retired GPT-5.5 in 15 Days. Did Your Evals Notice?

Book: Observability for LLM Applications Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools Me: xgabriel.com | GitHub On September 29, a pull request merged into Codex gave GPT-6.1... Weiterlesen: Codex Swapped Its Default Model and Retired GPT-5.5 in 15 Days. Did Y…