Even the most casual of PC users won't have missed that Microsoft is very keen for Windows and 365 customers to use Copilot. However, according to one report, it might not actually be Microsoft's own AI model behind the scenes, as a key internal division is being encouraged to road test the competition.
That's according to The Verge, which claims that sources have told them staff are using Anthropic's Claude, alongside Copilot, for AI coding tasks (aka vibe coding). Not that they're making the choice subversively; in fact, the software giant has been happy for its staff to try out various AI coding tools, including its own GitHub Copilot, Anthropic's Claude 4, and OpenAI's GPT-5.
