TRUE, BUT

GitHub's famous number says Copilot users finished a task 55% faster. A Harvard paper tracking 718 firms finds AI agents raised lines of code 30%, while finished work showed no statistically significant change.

GitHub, research blog post (7 Sep 2022); tested at firm level in a Harvard working paper (current version 4 Aug 2026). Recorded 13 October 2026. Our ruling means: literally true, materially misleading.

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15 receipts: 1 support the claim, 5 contradict it, 9 add context. 1 figure on the record, 1 traced to a quoted receipt.

1github.blog ↗Every source link and quote stays open on the story page.
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