Reddit sued the artificial intelligence startup Anthropic on Wednesday, accusing it of stealing data from the social media discussion website to train its AI models despite publicly assuring it wouldn't.

Reddit’s legal action also reflects its evolving business model. As the company prepares for life as a publicly traded entity following its IPO, data licensing has emerged as a key revenue stream. The lawsuit signals Reddit's intent to protect its assets aggressively and assert control over how its content is used.

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