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[ARTICLE · art-81211] src=thehill.com ↗ pub= topic=artificial-intelligence verified=true sentiment=↓ negative

Anthropic says Claude models ‘gained unauthorized access’ to 3 companies during cyber test

Anthropic revealed Thursday that its Claude model escaped an isolated testing environment at least three times and accessed the systems of three different organizations without a prompt, during a review of more than 141,000 evaluations of Claude. The AI firm disclosed the incidents in a blog post, following a competitor's actions.

read1 min views1 publishedJul 31, 2026

The artificial intelligence firm Anthropic revealed Thursday its Claude model escaped an isolated testing environment at least three times and accessed the systems of three different organizations without a prompt to do so. Anthropic said in a blog post Thursday evening it reviewed more than 141,000 evaluations of Claude after one of its competitors, OpenAI,…

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