Except that the OpenAI compatible endpoint isn't actually compatible. Doesn't support string enum values for function calls and throws a confusing error. Vert

Except that the OpenAI compatible endpoint isn't actually compatible. Doesn't support string enum values for function calls and throws a confusing error. Vertex at least has better error messages. My solution, just use text completions and emulate the tool call support client side, validate the responses against the schema, and retry on failure. It rarely has to retry and always works the 2nd time even without feedback.