Microsoft has launched Copilot Cowork, a new AI assistant that can run tasks in the background and simultaneously work across Microsoft 365 apps. The product integrates technology from Anthropic's Claude family of models into Microsoft’s existing Copilot assistant. This move comes as Microsoft aims to increase adoption of Copilot, which remains a small fraction of its commercial user base. The company also announced a new $99-per-user Microsoft 365 E7 tier, which includes Copilot and identity management tools, and a $15 product for managing AI agents. The announcement has mixed reactions, with some questioning whether Microsoft will continue to use lower-end models or older models in the product.