https://news.ycombinator.com/item?id=42561419
Deepseek promptly fixed it so that their UI responds with 'Hi! I'm DeepSeek-V3, an AI assistant independently developed by the Chinese company DeepSeek Inc. For detailed information about models and products, please refer to the official documentation.' - but only if you ask that as the first question of the conversation. Bury the 'what model are you' question after a few unrelated questions, and it'll happily tell you it's ChatGPT.
Is it possible that it's an actual distillation of weights, but into a radically different architecture? We don't have evidence of that, but that would be a great technical feat in itself.
Is it trained on a large set of user requests and OpenAI replies? Yes.
The question is, were these obtained by simply using the API contrary the user agreement at scale, or was there access to internal OpenAI datasets, or was there some kind of capture of conversations by a man-in-the-middle (which could be any of a number of AI access resellers)?
The answer hinges on which _requests_ were in that training set, something that won't be easy to investigate - unless you're OpenAI itself, and can identify 'trap streets' in the archive of all conversations, cases where ChatGPT once gave an unusual response to an unusual request, and DeepSeek just happens to match it.