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Rakuten fixes issues twice as fast with Codex

OpenAI Blog / 3/11/2026

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Key Points

  • Rakuten is using Codex, OpenAI's coding agent, to speed up software delivery and improve safety.
  • The company reports a 50% reduction in MTTR and automation of CI/CD reviews.
  • Codex enables Rakuten to deliver full-stack builds within weeks, accelerating timelines.
  • The move signals AI-assisted software engineering is becoming more widespread across industry and workflows.
Rakuten uses Codex, the coding agent from OpenAI, to ship software faster and safer, reducing MTTR 50%, automating CI/CD reviews, and delivering full-stack builds in weeks.