Microsoft Decision-1 now available on Vercel's AI Gateway
Microsoft's Decision-1 model is now available on Vercel's AI Gateway. According to Vercel, it answers typed questions about text with probabilities, choices, and scores, and can be used to classify support requests, pick the next step in a workflow, or assess an AI response against a rubric.
- Microsoft's Decision-1 is now available on Vercel's AI Gateway.
- It answers yes/no, choice and score questions about text, with probabilities for choice and score answers.
- Access is through the AI SDK decision API, the OpenAI-compatible Decisions API, or the TypeSafe-compatible API.
- Only an AI Gateway API key is needed, with no separate Azure account or deployment, according to Vercel.
- Decision calls appear in logs and count toward budgets alongside other model requests.
What Decision-1 does
Decision-1 is built around structured answers rather than free-form text. According to Vercel, the model can answer yes/no questions, choose among named categories, or score an input against an ordered set of criteria.
Multiple questions can share the same input in one request. For choice and score answers, the model returns probabilities for each option. Vercel says this lets an application decide when to act on a result and when to send an uncertain one for review.
The use cases Vercel names are:
- Classifying support requests
- Selecting the next step in a workflow
- Assessing an AI response against a rubric
How developers can call it
There are three ways to reach the model: the AI SDK decision API, the OpenAI-compatible Decisions API, and the TypeSafe-compatible API. Developers only need an AI Gateway API key. Vercel states there is no separate Azure account or deployment to set up.
To get started, requests use microsoft/microsoft-decision-1 as the model name. Vercel's example uses the experimental_decide function from the ai package. It passes a customer message, "My invoice payment failed and I need help immediately.", as the state. It then asks a single choice question, which team should handle the request, with two criteria: billing for payment and invoice issues, and technical for software and integration issues. The result is read from result.answers.team.
What it means for AI Gateway users
AI Gateway is Vercel's unified way to access models and track usage and cost. Vercel says decision calls appear in logs and count toward budgets alongside other model requests, so teams do not need a separate system to monitor them.
For developers who already route model traffic through AI Gateway, Decision-1 adds a model aimed at routing, triage and evaluation tasks, where a probability attached to each answer can drive automated handling or human review. Vercel points to its decision documentation for details on Choice, Score, and Boolean questions, and says all decision models on AI Gateway can be browsed on its site.
Vercel: Microsoft Decision-1 now available on AI Gateway
