Microsoft Copilot is now powered by GPT-5 too, mostly
August 8, 2025
Microsoft has added GPT-5 to Copilot, a day after adding OpenAI’s open-source GPT model to its local services.
GPT-5, which also powers ChatGPT, is now live within Copilot, at copilot.microsoft.com, Microsoft said Thursday. Presumably the same model will eventually power the Copilot application running on top of Windows PCs, but the Windows app appears to use just the older GPT-4 model for now…