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OpenAI has new agentic coding partner for you now: GPT-5-Codex


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

It was the only one to catch tricky backward compatibility issues and consistently found the hard bugs that other bots missed," says Aaron Wang, senior software engineer at Duolingo. It's trained on complex, real-world engineering tasks such as building full projects from scratch, adding features and tests, debugging, performing large-scale refactors, and conducting code reviews. Landing the change would have usually meant making a choice between taking the time to refactor and add tests and missing the deadline, or doing things quickly and risking instability," reported Tres Wong-Godfrey, tech lead at Cisco Meraki.

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