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Anthropic Had to Unplug Its Agent Evals From the Internet

This story is from 2026-10-10. It is preserved in the archive; the latest stories are on the live feed.

An operator running the free URL shortener da.gd noticed strange traffic in their server logs recently and reached out to Anthropic. Someone was feeding long strings into the shortener to bypass a character limit. It turned out to be Claude Opus 5 and Claude Mythos 5. Anthropic's internal web-fetch…

Read the full story at DEV Community — AI ↗

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  1. 2026-10-10 16:31 · DEV Community — AI
    Anthropic Had to Unplug Its Agent Evals From the Internet

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