Reddit filed a complaint against Anthropic, claiming that the AI lab used its data to train its models without authorization or compensation.

Reddit Inc. sued artificial intelligence firm Anthropic, saying it has used the social media company’s content without permission to train its AI models.

Reddit’s lawsuit, which was filed Wednesday, accuses the Amazon-backed AI company of breaching its user agreement. “As far back as December 2021…Anthropic was already—without authorization and in direct violation of Reddit’s User Agreement—training Claude on Reddit users” posts, the lawsuit claims.