Parallel Decisions Fast is free on Vercel AI Gateway for web-grounded decisions

Parallel’s Decisions Fast is now on Vercel AI Gateway, and it is free to call through November 23, 2026. It is not a chat model. You give it information about a company, product, policy, or anything else that changes, plus a set of questions, and it searches the live web and returns a probability and cited evidence for each answer. If you want to enrich CRM records, check eligibility, route leads, or verify claims, this is a good window to try it at no cost.

What you get

• Through November 23, calls to parallel/parallel-decisions-fast on Vercel AI Gateway are free, and you don’t need a separate Parallel account.
• It handles three question types: Boolean questions return the probability of yes, Choice questions pick from options you define, and Score questions rate against an ordered rubric.
• One request can hold up to 100 related questions that share the same context and retrieved evidence. The context window is 32,000 tokens.
• Results include source URLs, optional titles, and evidence excerpts. Citations cover the whole request rather than each individual answer.
• These requests show up in AI Gateway logs and spend budgets alongside your other model calls.

How to use it

1. Sign in to Vercel and create an API key in AI Gateway.
2. Use experimental_decide from the AI SDK, or send requests to https://ai-gateway.vercel.sh/v1/decisions, with parallel/parallel-decisions-fast as the model name.
3. Pass in the entity details and your questions, act automatically on high-probability answers, and send uncertain ones for review.

See the Vercel announcement, the AI Gateway model page, and the AI Gateway docs.