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Epoch AI asked LLM judges how long an experienced engineer would need, without AI, to reproduce each merged pull request from the 41 collaborators on OpenAI's public Codex repository. In the second quarter of 2026, work beyond what anyone could finish in a single unassisted day accounted for 8% of contributor-days, up from 2% a year earlier

SourceEpoch AI·Q2 2026

Verified 2026-08-15

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