OpenAI Codex Just Got Its Biggest Update Yet
r/ChatGPT
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Generative AI
OpenAI says Codex now works in the app, IDE, terminal, web, GitHub, iOS, and Slack. Recent upgrades bundled a new GPT-5.3-Codex model for agentic coding, a rebuilt CLI, an IDE extension for VS Code-compatible editors, faster cloud task performance via container caching, automated code review, an in-app browser for rendered pages, and computer use for macOS apps.