Everyone pitching the "AI" snake oil tonic says using it makes you code faster. Coders who use it honestly believe that. New research finds it not only doesn't make you code faster, it actually makes you code slower than without it.

Ars Technica, "Study finds AI tools made open source software developers 19 percent slower": https://arstechnica.com/ai/2025/07/study-finds-ai-tools-made-open-source-software-developers-19-percent-slower/

Source: METR, "Measuring the Impact of Early-2025 AI on
Experienced Open-Source Developer Productivity" [PDF]: https://metr.org/Early_2025_AI_Experienced_OS_Devs_Study.pdf