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Airbnb
Airbnb published a case study of an LLM-driven code migration. No mandate has been reported. In 2026 the CEO reported that most new code is AI-written, again without a stated requirement.[1][3][5]
Tools
Metrics tracked
- Airbnb compared the migration's duration with an estimate of how long it would take by hand, and tracked the share of files migrated per run.[1]
- Brian Chesky said on the Q1 2026 call that nearly 60% of the code Airbnb engineers produce is now written by AI, which he estimated at about twice the industry average.[3][5]
Guardrails
- Each file went through automated validation steps with retries, and the files the pipeline could not finish were completed by hand.[1][2]
Hiring, reviews & process changes
- Chesky said there is no room for 'pure people managers'. Many design and engineering managers are going back to coding or using Claude Code.[4][5]
Reported results
- Airbnb migrated nearly 3.5K test files from Enzyme to React Testing Library in 6 weeks. It had estimated the work at 1.5 years by hand. The first bulk run migrated 75% of files in four hours, and the pipeline reached 97% before the rest were finished manually.[1][2]
- Chesky said teams are shipping more features and iterating more quickly as a result.[5]
Metric tags: Time saved, Migration throughput, % code AI-generated
Editor's note: The Airbnb post shows no visible date. The month is taken from contemporaneous InfoQ coverage.
Sources
- Airbnb Tech: Accelerating large-scale test migration with LLMs · 2025-03 · company source
- InfoQ: Airbnb uses LLMs to migrate tests · 2025-03-28 · press source
- TechCrunch: Airbnb says AI now writes 60% of its new code · 2026-05-08 · press source
- Business Insider: Airbnb CEO says AI writes majority of code, managers going hands-on · 2026-05-08 · press source
- Motley Fool: Airbnb (ABNB) Q1 2026 earnings call transcript · 2026-05-07 · press source
Last verified 2026-10-25. Industry and size are editorial bands; see methodology. Spot an error? Submit a correction.