⚙️ AI Hardware

Rakuten Halves Bug-Fix Times with OpenAI's Codex — The Dev Shift No One Saw Coming

Rakuten just cut bug-fix times in half. OpenAI's Codex isn't hype — it's rewriting how a $15B e-commerce giant ships code.

Sarah Chen 📅 Mar 19, 2026 ⏱️ 4 min read 👁️ 8 views

⚡ Key Takeaways

Rakuten reduced MTTR by 50% using Codex for automated bug fixes and CI/CD reviews.
Codex enables full-stack builds in weeks by handling boilerplate across frontend and backend.
This signals a shift: devs become orchestrators, with agents owning routine code tasks.

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Written by

AI research editor covering LLMs, benchmarks, and the race between frontier labs. Previously at MIT CSAIL.

#AI dev tools #CI/CD automation #MTTR reduction #OpenAI Codex #OpenAI coding agent #Rakuten AI #Rakuten Codex #coding agents

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Originally reported by OpenAI Blog