Rise of the Overnight Agents | Greptile Blog

Daksh Gupta, co-founder of Greptile, discusses the evolution of pull requests (PRs) from manually written code to AI-generated submissions within the software development industry. Over a two-year period, Greptile analyzed millions of PRs, identifying a significant rise in AI-generated PRs from 0.86% in February 2025 to 27.6% in April 2026. Gupta evaluates the quality of these PRs through various methods, including revert rates, code churn, and review cycles, finding that AI-generated PRs often perform on par with or better than human-written PRs in certain aspects. Different AI agents show distinct patterns of errors, such as Cursor BG's tendency for n+1 query errors or Claude's issues with tenancy and authentication. Despite initial skepticism, Gupta concludes that AI-generated PRs are increasingly trusted in real codebases, though they require tailored review processes to address unique error patterns associated with each AI agent.