I’ve been noticing similar issues lately. The random switching between models is really frustrating, especially when working on framework-specific projects like Next.js 15. It would definitely help if Vercel gave more transparency on which model is being used in real time and why. Consistency is key when teams are paying for credits and relying on stable output.I also came across another thread where people are facing the same issue: https://community.vercel.com/t/click here usage-model-change-has-ruined-my-project/12688. This shows it’s not an isolated problem, so hopefully Vercel takes note and addresses it soon.