Codex isn’t great yet on Windows outside of WSL, and while we’ve merged https://github.com/openai/codex/pull/4269 to reduce the repetitive manual approvals on readonly commands, we’ve noticed that users seem to have more issues with GPT-5-Codex than with GPT-5 on Windows. This change makes GPT-5 the default for Windows users while we continue to improve the CLI harness and model for GPT-5-Codex on Windows.
codex-core
This crate implements the business logic for Codex. It is designed to be used by the various Codex UIs written in Rust.
Dependencies
Note that codex-core makes some assumptions about certain helper utilities being available in the environment. Currently, this
macOS
Expects /usr/bin/sandbox-exec to be present.
Linux
Expects the binary containing codex-core to run the equivalent of codex debug landlock when arg0 is codex-linux-sandbox. See the codex-arg0 crate for details.
All Platforms
Expects the binary containing codex-core to simulate the virtual apply_patch CLI when arg1 is --codex-run-as-apply-patch. See the codex-arg0 crate for details.