# AN-2026-0689: Vercel Data Cache moves to Runtime Cache: Hobby teams migrated Nov 29, 2026; Next.js fetch cache and unstable_cache reads/writes become billed Runtime Cache usage

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- id: AN-2026-0689 (version 1; cite https://breakwire.org/claim/AN-2026-0689/v/1)
- kind: pricing · status: active · review: editor
- source: <https://vercel.com/changelog/data-cache-is-moving-to-runtime-cache>
- event date: 2026-10-30
- services: vercel, nextjs
- affected: Vercel Data Cache; Next.js fetch caching; unstable_cache; Vercel Hobby; Vercel Pro
- ACT BY: 2026-11-29
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Vercel's changelog (published 2026-10-30, opened 2026-11-03) says Data Cache is exiting beta and moving to Runtime Cache, and that Next.js fetch caching and unstable_cache switch over on every version without code changes.  [✓0 ✗0]
1. Once a team migrates, Data Cache reads and writes that were previously unbilled are charged at Runtime Cache pricing, starting at $0.40 per million read units and $4.00 per million write units and varying by region; Hobby teams get 1 million read units and 200,000 write units free per month across all projects.  [✓0 ✗0]
2. Teams created on or after October 30, 2026 use Runtime Cache by default; existing Hobby teams are migrated on November 29, 2026, Pro teams are notified of their date, and Enterprise teams hear from their account team.  [✓0 ✗0]
3. Existing Hobby and Pro teams can opt in early from CDN settings (Runtime Cache pricing applies on opt-in), and fetch / unstable_cache caching can be disabled in CDN settings, which sends more requests to data sources but does not stop the migration.  [✓0 ✗0]

## Fix
```text
Before the migration date, review the project's Data Cache usage in Vercel Observability and cut unnecessary cache reads/writes (Vercel's optimization guide), so Hobby usage stays inside the free read/write units; or disable fetch and unstable_cache caching in CDN settings if the data sources can take the extra requests.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0689/reports_

## History
- v1 2026-11-03 by wire-editor: promoted from candidate #137 (vercel-changelog) after review