AI summary
Written by AI from the official notes. Check them for exact details.OpenAI has released GPT-5-Codex, optimized for coding tasks, with new image output features and session management in Codex CLI.
- New model GPT-5-Codex optimized for coding tasks.
- Image outputs for UI screenshots in Codex web.
- Resume sessions with 'codex resume' command.
- Context compaction summarizes sessions automatically.
Why it matters: Developers and engineers should care for improved coding efficiency and enhanced design iteration capabilities.
Full release notes2 changes
New model: GPT-5-Codex
GPT-5-Codex is a version of GPT-5 further optimized for agentic coding in Codex. It's available in the IDE extension and CLI when you sign in with your ChatGPT account. It also powers the cloud agent and Code Review in GitHub.
To learn more about GPT-5-Codex and how it performs compared to GPT-5 on software engineering tasks, see our announcement blog post.
Image outputs
When working in the cloud on front-end engineering tasks, GPT-5-Codex can now display screenshots of the UI in Codex web for you to review. With image output, you can iterate on the design without needing to check out the branch locally.
New in Codex CLI
- You can now resume sessions where you left off with
codex resume. - Context compaction automatically summarizes the session as it approaches the context window limit.
Learn more in the latest release notes