Chinese artificial intelligence company DeepSeek disrupted Silicon Valley with the release of cheaply developed AI models that compete with flagship offerings from OpenAI — but the ChatGPT maker suspects they were built upon OpenAI data.

KEY TAKEAWAYS Bloomberg is reporting that Microsoft and OpenAI are investigating whether a group linked to Chinese startup DeepSeek used improperly obtained data from the American AI company to launch the low-cost AI model that sparked a selloff Monday.

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.