Real‑world video demo: Using different AI models in GitHub Copilot

Claude 3.7 Sonnet, Gemini 2.5 Pro, GPT-4… developer choice is key to GitHub Copilot, and that’s especially true when it comes to picking your frontier model of choice. 

But with so many frontier generative AI models now available to use with GitHub Copilot (and more coming seemingly every day), how do you pick the right one for the job—especially with the growing capabilities of Copilot Chat, edit, ask, and agent modes?

In a recent video, I worked with GitHub’s Developer Advocate Kedasha Kerr (aka @ladykerr) to answer this exact question. Our goal? To build the same travel‑reservation app three different ways with Copilot ask, edit, and agent modes while swapping between Copilot’s growing roster of foundation models to compare each AI model in real-world development workflows.

We set out to build a very simple travel‑reservation web app (think “browse hotel rooms, pick dates, book a room”). To keep the demo snappy, we chose a lightweight stack...

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