Harvey and Legal AI Firms Turn to Open Models to Reduce Dependence on OpenAI and Anthropic

Legal AI startup Harvey has introduced Harvey Tenet, its first in-house model for legal reasoning, part of a wider move by legal technology companies to route more work through specialized open-weight systems rather than rely solely on OpenAI and Anthropic. The shift could lower model costs and give vendors more control, but it also moves responsibility for security, maintenance and model quality closer to the companies selling the applications.