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AI coding tools make developers slower but overconfident, study finds

A controlled survey conducted in July 2025 revealed that developers using AI tools for coding tasks were 19% slower than their counterparts, despite believing they were 20% faster. The study, published by Metr, noted that these initial findings were later updated to show improved performance, potentially due to increased familiarity and broader adoption of AI tools. AI

IMPACT AI tools may not yet be enhancing developer speed, despite user perception, suggesting a need for better integration or training.

RANK_REASON The cluster discusses a survey about AI tool usage and its impact on developer productivity, which falls under commentary on AI's practical application.

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AI coding tools make developers slower but overconfident, study finds

COVERAGE [1]

  1. Mastodon — sigmoid.social TIER_1 English(EN) · [email protected] ·

    In July 2025 developers working on their own code did a controlled survey with completing a set of tasks using AI tools. Those using AI were 19% slower but thou

    In July 2025 developers working on their own code did a controlled survey with completing a set of tasks using AI tools. Those using AI were 19% slower but thought they were 20% faster. Metr's report are is at https:// metr.org/blog/2025-07-10-early -2025-ai-experienced-os-dev-st…