Does GPT-6 in Microsoft 365 Copilot refer to GPT-6 Astra?

Hi Javier,

To answer your question directly: Yes, "GPT-6" in your model selector refers to a specific variant within OpenAI's GPT-6 model family, distinct from "GPT-6.1 Sol".

Here is what the labels represent:

• GPT-6 (or GPT-6 Astra): Refers to the flagship, high-reasoning GPT-6 Astra base model, which focuses on deep reasoning, complex multi-step workflows, and high-accuracy tasks.
• GPT-6.1 Sol: Refers to the lightweight, speed- and cost-optimized model variant designed for high-frequency daily tasks and faster interactive responses.

Because Microsoft 365 Copilot dynamically updates model routing during feature rollouts, internal model names like Astra or Sol are often simplified to GPT-6 in the end-user interface.
So, when you see “GPT-6” in the Microsoft 365 Copilot model selector, it is generally referring to "GPT-6 Astra", not a separate model called “GPT-6 Sol” or another unnamed variant.