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AI · October 1, 2026

Benchmark: AI doesn't find bugs unless you tell it what's wrong

Given a real repository, an agent must discover & repair as many bugs as they can. Agents are not given any hint about the type of bug or its location.

Benchmark: AI doesn't find bugs unless you tell it what's wrong launched on October 1, 2026 with 5 votes, #38 of 279 launches that month and more than 75% of that year's launches.

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What it does

Given a real repository, an agent must discover & repair as many bugs as they can. Agents are not given any hint about the type of bug or its location. Per-repository resource use includes non-deprecated retries and is averaged over evaluated repositories. Most existing software engineering benchmarks evaluate coding agents on concrete, well-specified tasks, commonly by providing a codebase together with a user-reported issue to resolve. However, as users delegate increasingly broad outcomes to coding agents, the natural next step is for agents to determine not only how to perform useful work, but also what useful work needs to be done. An agent entrusted with a repository should be able to…from swesweep.com

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