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OpenAI Codex
AI Product
Coding
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OpenAI's software-engineering agent, from cloud sandbox to CLI.
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Codex (relaunched 2025) runs coding tasks in parallel cloud sandboxes or locally, wired into ChatGPT accounts and GitHub. With Claude Code, Cursor and Copilot it defines the four-way race for the developer workflow.
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Record reviewed as of 2026-01-15 — see Methodology.