Decision-1 lands on AI Gateway: no Azure account, several questions per request

Decision-1 is now available through AI Gateway, turning judgments about text into choices, scores, or yes/no answers that carry probabilities. Reaching this kind of decision capability previously required a separate Azure account and deployment; now a single AI Gateway API key is enough. The call sets the model name to microsoft/microsoft-decision-1, and the example uses it to route a failed invoice to either the billing or the technical team.

The model handles three question types: yes/no, a choice among named categories, and a score against an ordered set of criteria. Multiple questions can share the same input within one request instead of each question being sent separately. Choice and score answers include a probability for each option, so an application can act directly or send an uncertain result for review.

There are three access paths: the AI SDK decision API, the OpenAI-compatible Decisions API, and the TypeSafe-compatible API. Decision calls appear in logs and count toward budgets alongside other model requests. AI Gateway provides unified model access with usage and cost tracking, so decision calls share the same accounting as ordinary model calls.

This report is for engineers who need to wire text judgments into an application, and it covers Decision-1's availability on AI Gateway, its three question types, and its three access paths. The material states that requests use microsoft/microsoft-decision-1 as the model name and shows one ticket-routing example. For a next step it points to the decision documentation and the decision model guides.

The material gives no accuracy figures for Decision-1 on specific tasks and no comparison with other models, and how probability values should drive thresholds is left to the application. Availability is described only for the AI Gateway entry point, with other deployment paths unstated.