My real comment is, why were they not just using their self-hosted copies of it? Do they pay back Anthropic for use of it in Azure? Broker a deal, let Anthropic charge you drastically less to use their model AND Anthropic could have made Claude Code work directly with Azure for Microsoft employees. Pennies on the dollar, and Microsoft could do it using low use GPUs to save on cost, or stack underused GPU compute (this is how serverless was born btw - its the unused resources in a web server somewhere).

When you consider that xAI's old data center was enough to bring Anthropic back ahead, it tells me Microsoft could host their own on underutilized previous gen GPUs that are sitting there wasting server real estate.