In its lawsuit, Reddit said Anthropic had also declined to enter into a licensing agreement for data and had unjustly enriched itself at Reddit’s expense.

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 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.