Selecting the Appropriate Model

The community member is having an issue where only the "sonnet vision" model is showing up when they try to select a model, and they are asking how to resolve this. Other community members respond that the "haiku, sonnet, and opus models are vision models by default", but the "vision part is optional" and the prompts should work even without sending any image data. However, the original community member says it's still not working and they are getting an error saying the "input must be a string" when using the API. They provide a trace ID for one of the calls, and another community member offers to help investigate the issue further if the original community member can share the core request they are sending.