# Vercel — Scale to one: How Fluid solves cold starts

- Company: Vercel (vercel.com)
- Announced: 2025-09-18T13:00:00+00:00
- Category: capability-change
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://vercel.com/blog/scale-to-one-how-fluid-solves-cold-starts
- Record: https://forck.live/items/20818-scale-to-one-how-fluid-solves-cold-starts
- Subject: v0 / AI SDK / AI Gateway

Vercel announced that its Fluid compute platform achieves zero cold starts for 99.37% of requests, with fewer than one in a hundred requests experiencing a cold start. The approach combines scale-to-one (keeping at least one instance warm), Fluid compute's concurrent request handling, predictive scaling, bytecode caching, and rolling releases. Scale-to-one applies automatically to production deployments on Pro and Enterprise plans, and to the most recent branch deployment for Enterprise plans, with no additional cost beyond usage.

## Evidence

Verbatim from https://vercel.com/blog/scale-to-one-how-fluid-solves-cold-starts:

> Powered by Fluid compute, Vercel delivers zero cold starts for 99.37% of all requests. Fewer than one request in a hundred will ever experience a cold start.

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