METR’s developer productivity research: 2026 update

You may be seeing posts claiming METR s widely-cited 2025 study has been followed up with new research showing an 18% productivity boost. That s not what the article says. METR: We are Changing our Developer Productivity Experiment Design In 2025, METR found experienced open-source developers using GenAI were 19% slower and notably, developers themselves thought [ ]