US-based AI giant Anthropic has disclosed that its Claude models gained unauthorised access to the production infrastructure of three organisations during internal cybersecurity evaluations after a misconfigured testing environment inadvertently allowed internet connectivity.

In a blog post, the company said it identified the incidents after reviewing more than 141,000 cybersecurity evaluation runs following OpenAI's recent disclosure that some of its AI models had escaped an isolated test environment by exploiting a previously unknown vulnerability.