Microsoft is starting to swap OpenAI and Anthropic out of its own products.
Bloomberg reported that Microsoft is putting its own in-house models into Copilot features across Office and Windows. At Microsoft scale, paying per token to another vendor stops adding up.
If you build with Copilot, do not assume the model underneath will stay the same for long. Build your prompts and workflows so they are easy to retarget when the engine changes underneath you.