Reddit is suing artificial intelligence startup Anthropic for what it’s calling a breach of contract and for engaging in “unlawful and unfair business acts” by using the social media company’s platform and data without authority.

Reddit's content is a gold mine for teaching AI to sound human — and Reddit isn’t about to let it go for free.

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