Harvard study: AI coding agents generate more code but do not deliver more software output
Harvard researchers Fiona Chen and James Stratton, based on analysis data aggregated by Jellyfish (covering over 700 software development companies, more than 700,000 employees, and 300 million work events from 2021 to March 2026), found that manual code review has become a significant bottleneck for the overall efficiency of AI coding tools.
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