OpenAI, Anthropic contractor Mercor targeted in major security breach — what data was stolen, who carried out the hack?

Mercor, a $10 billion AI startup that provides data to major AI firms, including OpenAI and Anthropic, has confirmed that it was hit by a security breach that may have exposed sensitive company and user data.

The security incident was linked to a supply-chain attack involving the open-source project LiteLLM. Mercor on Tuesday confirmed to TechCrunch that it was “one of the thousands of companies” affected by the compromise of LiteLLM’s security.