Stay informed with free updatesSimply sign up to the Artificial intelligence myFT Digest -- delivered directly to your inbox.OpenAI says it has found evidence that Chinese artificial intelligence start-up DeepSeek used the US company’s proprietary models to train its own open-source competitor, as concerns grow over a potential breach of intellectual property.The San-Francisco-based ChatGPT maker told the Financial Times it had seen some evidence of “distillation”, which it suspects to be from D...