OpenAI has warned US lawmakers that its Chinese rival DeepSeek is using unfair and increasingly sophisticated methods to extract results from leading US AI models to train the next generation of its breakthrough R1 chatbot, according to a memo reviewed by Bloomberg News. In the memo, sent Thursday to the House Select Committee on China, OpenAI said that DeepSeek had used so-called distillation techniques as part of “ongoing efforts to free-ride on the capabilities developed by OpenAI and other US frontier labs.” The company said it had detected “new, obfuscated methods” designed to evade OpenAI’s defenses against misuse of its models’ output. OpenAI began privately raising concerns about the practice shortly after the R1 model’s release last year, when it opened a probe with partner Microsoft Corp. into whether DeepSeek had obtained its data in an unauthorized manner, Bloomberg previously reported.

Full report : In a memo to US lawmakers, OpenAI accused DeepSeek of using distillation techniques to train the next generation of R1 and “free-ride” on leading US AI models.