Anthropic Claims Kimi Used Claude to Generate Responses: Nearly 300,000 Requests in 10 Days

Beating AI Express, Anthropic released a new AI abuse investigation report, alleging that Moonshot AI (developer of Kimi) had directly forwarded some Kimi users’ requests to Claude, then displayed Claude’s responses to those users. Anthropic said that within a 10-day window, nearly 300,000 user requests were forwarded in this manner, with the vast majority routed to its Opus model. Moonshot used 5,380 unauthorized accounts for this scheme, and the affected users believed they were still using Kimi at the time. Anthropic also alleged that Moonshot saved some user interactions and used "cross-session replay" to extract Claude’s full reasoning process for training its own models. Between May and July, over 23 million such distillation interactions took place. Some actual user requests included internal corporate code and valid credentials, which were also forwarded to Claude. Anthropic noted it was unaware if these users had been notified that their data would be sent to a third party. These claims currently stem primarily from Anthropic’s internal investigation and have not been independently verified. In response to similar distillation allegations raised earlier by three U.S. institutions, China’s Ministry of Commerce stated the claims are "unfounded and legally baseless," adding that distillation is a common practice in the industry.