Claude Hallucinates Professor's Move to MIT Even With Web Search Enabled

conitzer · x · 2026-07-30

Vincent Conitzer pointed out that Claude, even with web search enabled, produced a severe hallucination by falsely claiming he had moved to MIT, complete with a citation link.

This highlights that despite being equipped with web search capabilities, LLMs remain unreliable for verifying specific facts, and such fabrications persist.

Related event: Claude's Web Search Caught Hallucinating Scholar's MIT Move(3 posts)→

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