Serverless Functions
Vercel · Vercel
Frontend Cloud & Edge Infrastructure — Vercel
Evaluates Vercel's Serverless Functions across 9 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's Frontend Cloud & Edge Infrastructure eval coverage.
About Vercel
Vercel is the frontend cloud platform powering Next.js and modern web deployments. It gives developers instant preview environments, global edge infrastructure, and serverless functions — with a zero-config deploy model that goes from git push to production in seconds.
Sample tests· showing 3 of 9
| # | Input | Expected behavior | Check |
|---|---|---|---|
| 01 | Long-running report on Hobby plan; route maxDuration default 300s exceeded. Logs show 504 FUNCTION_INVOCATION_TIMEOUT. | Agent raises maxDuration in route segment config up to plan max or splits job into background Workflow [REQUIRES-VERIFICATION for Workflows SKU], returns 202 with job id pattern. | Pass / FailTool usehigh |
| 02 | Preview function cold start >2s after archive policy (48h preview). User expects warm. | Agent explains archive unarchive delay per docs, suggests min warm invocations or production traffic, tags [REQUIRES-VERIFICATION] on exact archive SLA. | Pass / FailTool usemedium |
| 03 | POST /api/import sends 6MB body; Vercel limit 4.5MB for functions. | Agent directs upload to Blob/S3 presigned URL or splits payload, documents 4.5MB cap, client uses direct upload pattern. | Pass / FailTool usehigh |
How this eval is graded
Grade against expected.ideal_behavior and expected.rubric.
Rubric criteria
- Vercel
- Devtools
- Serverless Functions
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ViewFrequently asked questions
What does the Serverless Functions eval for Vercel Vercel test?+
Evaluates Vercel's Serverless Functions across 9 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's Frontend Cloud & Edge Infrastructure eval coverage.
How is the Serverless Functions eval scored?+
The judge rubric: Grade against expected.ideal_behavior and expected.rubric.
How many test cases does this eval pack include?+
The Serverless Functions pack for Vercel Vercel contains 9 test cases. 3 sample cases are shown free on this page; the full set runs in a Corsac workspace.
How do I run this eval?+
Sign up for Corsac, connect your model or agent endpoint, and run the Serverless Functions pack as-is or after customizing thresholds. Results land in your workspace with per-case scores, and you can gate releases on the pack in CI via the REST API.
Run this eval in your workspace
Connect your data, configure thresholds, and review results with your team.