Although many users are satisfied with Rust build performance, a significant fraction of users report that slow builds and rebuilds in several common workflows are a ‘big problem’ for them.

From cloud hand-offs to GitHub reviews, GPT-5-Codex is optimized for agentic coding and designed to supercharge developer workflows.

OpenAI is rolling out the GPT-5 Codex model to all Codex instances, including Terminal, IDE extension, and Codex Web (codex.chatgpt.com).