AI_DecisionRefusalError

This experimental error identifies questions that a decision model declined to answer, such as a question the provider's safety policy refuses. It is exported from ai and @ai-sdk/provider as Experimental_DecisionRefusalError.

Decision models report a refusal as an answer with type: 'refusal'. experimental_decide throws this error when any answer is a refusal, after the provider call and without retrying it.

Properties

• questionIds: The IDs of the refused questions.
• provider: The provider of the decision model.
• modelId: The decision model ID.
• message: A description of the refused questions and model.

Checking for this Error

Use the marker-based isInstance check, which works across package copies:

import { Experimental_DecisionRefusalError as DecisionRefusalError } from 'ai';

if (DecisionRefusalError.isInstance(error)) {
  console.log(error.questionIds, error.modelId);
}