GPT-5.6 family added to codex
OpenAI added the GPT-5.6 family to Codex, as shown in the diff between versions rust-v0.142.2 and rust-v0.142.3.
Background
- Codex is OpenAI's internal code-generation system (separate from the public ChatGPT/GPT APIs), used by employees to write and review code.
- This is a version diff (changelog) showing that a "GPT-5.6 family" was added to Codex, suggesting OpenAI is iterating on internal model families that may or may not correspond to publicly announced GPT versions.
- The "rust-v" prefix indicates a version of Codex optimized for the Rust programming language.
- The diff itself contains no details about GPT-5.6's capabilities, architecture, or release plans — just that the model family was added to the internal tool.