Musk's xAI is adopting an on-site strategy, dispatching engineers to potential customers' offices to compete with OpenAI and Anthropic for clients. Shift4 Payments decided to switch to xAI's Grok while retaining Anthropic's Claude. xAI's customers are primarily associated with Musk's enterprises and government, reflecting a common trend in the AI industry where competitors are also deploying engineers to support customers.