You'll notice
New clearer error when a chosen model isn't available for your account
What
When Claude Code checks whether a requested model can be used, it now tells the difference between a permission problem and a generic API error. If your account simply doesn't have access to the model you asked for, you'll now see a specific message: "Model '...' isn't available for your account."
Why
This makes it clearer when a model failure is because of account access rather than a transient API issue, so you know to check your plan or permissions instead of retrying or debugging a connection problem.