# Do coding agents recommend Vercel Functions?

> Vercel Functions was chosen in 23% of 287 judged serverless compute sessions, ranking second. Measured with Claude Code, Codex and Cursor.

Source: https://armature.tech/library/do-coding-agents-recommend-vercel-functions
Published: 2026-09-03
Publisher: Armature, Inc. (https://armature.tech)

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> Vercel Functions was chosen in 23% of 287 judged serverless compute sessions, ranking second. It was also raised as a candidate in 127 further sessions without being chosen.

This page reports what happened when Claude Code, Codex and Cursor had to solve a problem in serverless compute inside a realistic codebase. Not what a chat assistant says about Vercel Functions. What an agent actually installed.

## The numbers

| | |
| --- | --- |
| Category | Serverless compute |
| Sessions in the category | 287 |
| Sessions where Vercel Functions was chosen | 65 |
| Install share | 23% |
| Rank in category | 2 of 13 |
| Codebases it won in | 2 |
| Raised as a candidate, not chosen | 127 |
| Chosen when considered | 34% |
| Site | vercel.com |

## By agent

The three agents agree closely on Vercel Functions, choosing it at rates within 4 points of each other.

| Agent | Sessions | Chose Vercel Functions | Share |
| --- | --- | --- | --- |
| Claude Code | 96 | 24 | 25% |
| Codex | 96 | 20 | 21% |
| Cursor | 95 | 21 | 22% |

## By who was asking

Vercel Functions does much better with one kind of buyer than another. It won 47% of sessions asked as junior developer and 0% of those asked as enterprise team.

| Who is asking | Sessions | Chose Vercel Functions | Share |
| --- | --- | --- | --- |
| Vibe coder | 36 | 0 | 0% |
| Junior developer | 72 | 34 | 47% |
| Senior engineer | 107 | 31 | 29% |
| Enterprise team | 72 | 0 | 0% |

## What Vercel Functions was up against

The full ranking in serverless compute, from the same sessions:

| # | Product | Runs won | Share |
| --- | --- | --- | --- |
| 1 | AWS Lambda | 70 | 24% |
| 2 | Vercel Functions **(this page)** | 65 | 23% |
| 3 | Built in-house (no product adopted) | 50 | 17% |
| 4 | Azure Functions | 36 | 13% |
| 5 | Cloudflare Workers | 20 | 7% |
| 6 | Google Cloud Run | 11 | 4% |
| 7 | Inngest | 7 | 2% |
| 8 | Render | 5 | 2% |

## What this means

A solid second or third position in a category means the agent is genuinely choosing rather than reaching automatically. That is a winnable position, because the inputs it uses can be changed.

The fastest gains are usually in the sessions that were nearly won: read them, find the step where the agent moved on, and fix that step.

## Where these numbers come from

The 287 sessions in serverless compute are part of a published set of 5,292, run with real coding agents inside realistic codebases and judged blind. The full method is on one page: [how we measured this](/library/how-we-measured-this).

Every serverless compute run can be replayed on [the board](/leaderboards/serverless).

If you work on Vercel Functions: the judge recorded a reason for every session where it was raised and passed over. Those reasons are in the transcripts.

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## Common questions

### Do coding agents recommend Vercel Functions?

Yes. Vercel Functions was chosen in 65 of the 287 judged sessions in serverless compute, a 23% install share, ranking second in its category.

### Does Claude Code recommend Vercel Functions?

In 24 of the 96 sessions in serverless compute run with Claude Code, which is 25%.

### Do different coding agents treat Vercel Functions differently?

Not much. The three agents chose it at similar rates, between 21% and 25% of their runs.

### How was this measured?

Real coding agents at pinned versions were run in sandboxes inside 51 realistic codebases and asked to solve real tasks. A simulated project owner approved or questioned each recommendation before any code was written, and a judge from a model family that builds none of the agents read every session blind.

### How often is Vercel Functions considered but not chosen?

It was raised as a candidate in 127 sessions without being chosen, and chosen in 65. That is a 34% conversion from considered to chosen.

## Read next

- [How to get picked for serverless compute by coding agents](https://armature.tech/library/serverless-coding-agents-playbook) (Markdown: https://armature.tech/library/serverless-coding-agents-playbook.md)
- [Do coding agents recommend AWS Lambda?](https://armature.tech/library/do-coding-agents-recommend-aws-lambda) (Markdown: https://armature.tech/library/do-coding-agents-recommend-aws-lambda.md)
- [Do coding agents recommend Azure Functions?](https://armature.tech/library/do-coding-agents-recommend-azure-functions) (Markdown: https://armature.tech/library/do-coding-agents-recommend-azure-functions.md)
- [Do Claude Code, Codex and Cursor pick the same tools?](https://armature.tech/library/do-claude-code-and-codex-agree) (Markdown: https://armature.tech/library/do-claude-code-and-codex-agree.md)

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