# Vercel adds experimental Jev decision API to Python SDK

_Published Friday, October 2, 2026 at 1:36 PM EDT · AI · Latest · Tier 2 — Notable_

![Vercel adds experimental Jev decision API to Python SDK — Primary](https://assets.vercel.com/image/upload/contentful/image/e5382hct74si/3JqorqWK9YfLUoNHKDbBuV/887e6f03a2fb0d836995ac077c006253/jev_for_python_eng.png)

Vercel released a Python AI SDK update with an experimental evaluate() API for Jev, a model that selects among defined answers rather than generating free-form text. Developers can access it with an AI Gateway key and submit text or structured data alongside questions.

The API supports choosing an answer, scoring input on a defined scale and estimating whether a statement is true. Vercel says responses conform to specified types and choices. Its examples also expose limitations: Jev misclassified a partially typed Python expression, and an experiment generating code produced syntactically valid but mostly incorrect programs.

## Sources

- [Vercel News](https://vercel.com/blog/jev-for-python-engineers)

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Canonical: https://techandbusiness.org/newswire/aAC0MaxTJUP03QAN2va4n2
Published: 2026-10-02T17:36:34.333Z
Story chronology: 2026-10-02T07:00:00.000Z
Retrieved: 2026-10-02T19:48:05.227Z
Publisher: Tech & Business (techandbusiness.org)