OpenAI has signed a $11.9 billion agreement with CoreWeave, a GPU-heavy cloud service provider.The deal involves OpenAI receiving $350 million worth of equity in CoreWeave.CoreWeave, backed by Nvidia, runs an AI-specific cloud service with a network of 32 data centers and over 250,000 Nvidia GPUs.This agreement comes as a challenge to the deteriorating relationship between Microsoft and OpenAI.