Author here. We analyzed 802K merged PRs from GitHub Archive to see how code review practices changed from 2024 to 2025. The headline stat got worse—up from 83% in 2024.
Other findings: self-merge rates hit 71%, bot PRs collapsed from 62% (2022 peak) to 15.5%, and first-time contributors now wait 38% longer vs 53% last year.
We also looked at how OpenAI Codex, Gemini CLI, and Claude Code ship compared to the benchmarks. Happy to answer questions about methodology.
Author here. We analyzed 802K merged PRs from GitHub Archive to see how code review practices changed from 2024 to 2025. The headline stat got worse—up from 83% in 2024.
Other findings: self-merge rates hit 71%, bot PRs collapsed from 62% (2022 peak) to 15.5%, and first-time contributors now wait 38% longer vs 53% last year.
We also looked at how OpenAI Codex, Gemini CLI, and Claude Code ship compared to the benchmarks. Happy to answer questions about methodology.