User says Opus 5 repeatedly deleted /dev/null in a frustrating real-world test

Turn_Trout · x · 2026-07-26

A user says Opus 5 has become frustrating to work with over the last day, describing confusing responses and repeated mistakes. In one concrete example, they say the model has deleted /dev/null at least three times.

The post is essentially a field report on model misbehavior: not a benchmark, but a real-world failure mode that could matter to people tracking Claude/Opus reliability in agentic workflows.

Related event: Anthropic's Opus 5 Exhibits Bizarre Behaviors in Testing(2 posts)→

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