Reddit sues Anthropic for unauthorized scraping of user data to train Claude
Reddit filed a federal lawsuit in California against Anthropic, accusing the company of using millions of Reddit user comments without permission to train its Claude AI models. The suit alleges that Anthropic's systems accessed Reddit's servers over 100,000 times after the company claimed to have blocked such access, and that licensing negotiations between the parties failed.
What happened
Reddit filed a federal lawsuit in California against Anthropic on June 4, 2025, alleging that Anthropic used millions of Reddit user comments without permission to train Claude large language models.
Reddit claims Anthropic's automated systems accessed its servers over 100,000 times in the months following the company's claim that it had blocked the company's robots. Reddit states it attempted to negotiate a data licensing agreement with Anthropic, but those discussions failed.
Reported impact
Reddit seeks monetary damages and a court order requiring Anthropic to comply with Reddit's user agreement terms.
Index analysis
The lawsuit is part of a broader dispute between content providers and technology companies over data use for training AI models. Reddit has struck similar licensing deals with Google and OpenAI.
Classification
Sources and evidence
This record was researched and written by the Index, based on the following original reporting.