The software giant said Wednesday that it’s starting to draw on an AI model from Anthropic to answer some queries in the Microsoft 365 Copilot assistant for commercial clients.

The effort represents another step toward diversification in generative AI for Microsoft, which has mainly relied on OpenAI models for artificial intelligence features in Bing, Windows and other products. As part of a strategic partnership, Microsoft has invested more than $13 billion in OpenAI, and OpenAI operates its models in the Azure cloud, among other places.