OpenAI Codex
OpenAI's cloud coding agent. Runs in a sandboxed container, reads your repo, executes tasks, and submits PRs. Uses GPT-5.3 (codex model). Available in ChatGPT.
Codex is OpenAI's autonomous coding agent, accessible through ChatGPT. It clones your GitHub repo into an isolated cloud container, reads the codebase, and executes multi-step tasks - writing code, running tests, and creating pull requests. Because it runs in a sandbox, it can't accidentally break your local environment. It uses the codex-mini model (based on GPT-5.3) optimized for code. My Codex video hit 216,000 views, making it one of my top 5 videos of all time. I use it with the `codex exec` CLI for headless automation.
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OpenAI Codex Videos
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OpenAI's cloud coding agent. Runs in a sandboxed container, reads your repo, executes tasks, and submits PRs. Uses GPT-5.3 (codex model). Available in ChatGPT.
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