# Vercel Flags now supports JSON values

DevFeed: [Vercel Flags now supports JSON values](<https://devfeed.tech/articles/vercel-flags-now-supports-json-values-1147.md>)

Original publisher: [Read original article](<https://vercel.com/changelog/vercel-flags-now-supports-json-values>)

Author: Chris Widmaier

Published: 2026-05-07T09:00:00Z

Content type: release

Language: en

Sources: [Vercel News](<https://devfeed.tech/sources/vercel-news.md>)

Topics: [Vercel](<https://devfeed.tech/topics/vercel.md>), [JSON](<https://devfeed.tech/topics/json.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [configuration](<https://devfeed.tech/topics/configuration.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [feature](<https://devfeed.tech/tags/feature.md>), [json](<https://devfeed.tech/tags/json.md>), [model](<https://devfeed.tech/tags/model.md>), [models](<https://devfeed.tech/tags/models.md>), [vercel](<https://devfeed.tech/tags/vercel.md>)

## AI overview

Vercel Flags now supports JSON values in addition to boolean, string, and number values. A single JSON flag can consolidate related feature flags and support model configuration, A/B testing, progressive traffic routing, and rapid model switching when a provider has issues.

## Source excerpt

You can now store JSON values in Vercel Flags, extending the existing support for boolean, string, and number values. This allows you to collapse what used to take several related flags into a single feature flag. For example, to A/B test how a different model performs, you can now define a single model flag. This allows you to manage one flag that serves the full object rather than managing ai_model, ai_temperature, and ai_max_tokens separately: Use Vercel Flags to progressively route traffic to a new model, A/B test, or quickly switch models in case a provider is having issues. Try it out or learn more about Vercel Flags. Read more