Types & errors
RunResult carries text, metrics, trace, and context. HTTP detail payloads are normalized into TokenSaverError subclasses.
Common exceptions: AuthenticationError, QuotaExceededError, ValidationError (including LLM_MODEL_NOT_SUPPORTED, RAG codes), ServerError (NETWORK_ERROR).
Full tables & signatures
See All methods (single page) for Return types and Errors cards, and copy-pasteable exception handling.
HTTP reference: Errors & quotas.