Mercor, which has worked with OpenAI, Anthropic and Meta, says it disputes the allegations.

After falling victim to a hacker, Mercor is facing lawsuits and reportedly losing big-name customers.

Meta has paused work with Mercor after a LiteLLM-linked security breach, raising new concerns about AI vendor risk and open-source supply chain exposure.

Mercor confirmed to Business Insider on Friday that the company had experienced a security breach.

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