PromptUnit: Pricing, Features & Best Use Cases

Our take: PromptUnit fits developers paying API costs for Claude Code, Cursor, Cline, Windsurf or Codex CLI who want cheaper-model routing and per-feature cost visibility, with the first $5 of savings free.

Main limitation: It works only with five named tools today, and after the first $5 saved it takes 20% of savings.

By the AI Tool Atlas editors. Based on the vendor's official documentation; we have not tested this product hands-on. What “documented overview” means

Who PromptUnit fits

PromptUnit fits developers paying API costs for Claude Code, Cursor, Cline, Windsurf or Codex CLI who want cheaper-model routing and per-feature cost visibility, with the first $5 of savings free. Based on the vendor's documentation, not on a hands-on test.

Best for: Developers paying API costs for coding agents

Also a good fit for

Teams wanting per-feature AI cost visibility

Consider another tool if supports only five named tools today per the site

Or if

After the first $5 saved, fee is 20% of savings
Requires an account to get a key

PromptUnit pricing and usage limits

Prices checked Oct 1, 2026 on the official US pricing page. Official pricing ↗ Prices and limits change often.

Free access and trial conditions

First $5 of savings free.

Same free trial; no card needed.

Paid plans: what changes as you upgrade

Free trial web

Free source (opens in a new tab)

One-time

For: Trying it on real usage

Limits

Until $5 in savings

Includes

Real routing
Full dashboard

1 more

No credit card

Pay on savings web

Usage-based source (opens in a new tab)

Month

For: Ongoing use

Limits

Card required after first $5

Includes

No charge if no savings
Cancel anytime

Usage caps, credits and extra costs

Provider API charges are paid to your providers.

Payments processed via Paddle.

What is PromptUnit, and how does it work?

PromptUnit sits between AI coding tools (Claude Code, Cursor, Cline, Windsurf, Codex CLI) and model providers. The user points the tool at a PromptUnit base URL and key, and requests are routed to a lower-cost model when the site says it is sufficient. A dashboard shows what each request costs by feature and model plus estimated savings. The docs cover OpenAI and Anthropic integrations, response headers, logging modes and limits and billing.

PromptUnit's official site: how the product presents itself. promptunit.ai, captured Oct 2, 2026

What you provide and what you get back

What you give PromptUnit and what comes back, from its documentation

You provide

API requests from a coding tool pointed at a PromptUnit base URL
Your PromptUnit key and provider API keys

You get back

Routed model responses
Dashboard of cost by feature and model
Estimated savings per request

Where you can use it

Platforms: Web
Account: Required
Tools: Claude Code, Cursor, Cline, Windsurf, Codex CLI
Fee: 20% of savings after first $5
Claimed savings: 40-70% (vendor claim)
Key storage: AES-256 encrypted

What people use PromptUnit for

Scenarios are worked out by our editors from the documentation; the actual result depends on your input and plan.

Lower AI coding tool API spend

Who: Developers on usage-billed coding agents
You provide: Claude Code or Codex CLI traffic
Expected result: Simple edits and lookups routed to cheaper models with a lower bill
Plan needed: Free trial then percent-of-savings
Limitation: Savings of up to 70% are a vendor figure source (opens in a new tab)

Track token cost by feature and model

Who: Engineering leads
You provide: Requests tagged by feature
Expected result: Dashboard of token cost by feature, model and request
Plan needed: Any
Limitation: Metadata only; content is not stored source (opens in a new tab)

Route Claude Code or Codex CLI traffic through one endpoint

Who: Cursor or Cline users with own keys
You provide: Base URL override in settings
Expected result: Same tool and workflow through one endpoint
Plan needed: Free trial
Limitation: Tool must allow a custom endpoint source (opens in a new tab)

What PromptUnit does, and where it stops

Base-URL integration for five coding tools

Points five coding tools to a PromptUnit base URL and key Needs no new app or SDK

Access: Free trial and afterLimit: Only Claude Code, Cursor, Cline, Windsurf and Codex CLI listed source (opens in a new tab)

Automatic routing to cheaper models

Routes a request to a cheaper model only when proven adequate Cuts spend without quality loss (vendor claim)

Access: AutomaticLimit: Complex reasoning stays on the strong model source (opens in a new tab)

Cost dashboard by feature and model

Dashboard shows what each request costs by feature and model plus estimated savings Shows where money goes

Access: Free trial includes full dashboardLimit: Feature tag must be supplied source (opens in a new tab)

OpenAI and Anthropic integrations

Supports OpenAI and Anthropic integrations with response headers and logging modes Fits existing SDK code

Access: DocsLimit: Other providers not listed source (opens in a new tab)

PromptUnit: strengths and limits

Reasons to choose PromptUnit

First $5 in savings free, no credit card Real usage proves value before paying documented source (opens in a new tab)
Setup is a base URL and key About a minute per tool documented source (opens in a new tab)
No charge for periods with no savings Fee tracks results documented source (opens in a new tab)
Content is not stored, only metadata Lower code exposure documented source (opens in a new tab)
Account deletion removes data within 24 hours Clean exit documented source (opens in a new tab)

Check before paying for PromptUnit

Supports only five named tools today Other editors are excluded documented source (opens in a new tab)
After the first $5, fee is 20% of savings Large savings mean a large fee documented source (opens in a new tab)
Account required to get a key Extra signup step documented source (opens in a new tab)
Savings claims (up to 70%) are vendor figures Results vary by workload documented source (opens in a new tab)
Requests pass through PromptUnit servers Adds a third party in the request path documented source (opens in a new tab)

How to use PromptUnit for cutting Claude Code API costs

Set up PromptUnit

Sign up free to receive a PromptUnit key
Store your Anthropic key in PromptUnit as the privacy page describes
Set ANTHROPIC_BASE_URL to the PromptUnit endpoint in your shell profile
Add the PromptUnit headers from the quick start

Example: cutting Claude Code API costs

Run Claude Code as normal for a coding session
Open the PromptUnit dashboard
Review cost by feature and model
Check estimated savings

Review and export the result

Confirm requests appear in the dashboard
Compare model used against the one you picked

PromptUnit API

API access and separate billing

PromptUnit has no public API in its official documentation. OpenAI-compatible and Anthropic integrations via base URL API documentation ↗

Privacy, data use and commercial rights

Summarized from the vendor's current policies; this is not legal advice and a vendor's badge is not an independent audit.

How your inputs and outputs are handled

Requests pass through servers for routing; the site says content is not stored, only metadata.

Not stated beyond anonymized routing signals.

Data kept while the account is active; deleted within 24 hours after deletion; billing records up to 7 years.

Commercial use and plan restrictions

Not stated.

Controls for business users

AES-256 encryption of provider keys

Policies: promptunit.ai/privacy

Best PromptUnit alternatives for different needs

"Better suited" is based on documented features and pricing, not on a head-to-head test.

Cursor: better suited to

GitHub Copilot: better suited to

Devin Desktop (formerly Windsurf): better suited to

Claude: better suited to

Alternatives
Alternative	Pricing	Limitation
Cursor	—	—	Compare
GitHub Copilot	—	—	Compare
Devin Desktop (formerly Windsurf)	—	—	Compare
Claude	—	—

Explore PromptUnit further

PromptUnit pricing, plan by planEvery plan with USD prices, limits and what is free.Best PromptUnit alternativesTools for the same job, by need and starting price.Best AI coding toolsOur picks in this category, compared by price and free tiers.

If you are looking at PromptUnit

More coding tools

Guides and comparisons

Claude Code or GitHub Copilot for your work

PromptUnit user reviews

No user reviews yet.

Used PromptUnit? Be the first to share your experience.

Write a review

PromptUnit FAQ

Which tools work with PromptUnit?

Claude Code, Cursor, Cline, Windsurf and Codex CLI. source (opens in a new tab)

What does it cost?

Free until $5 in savings, then 20% of what it saves; nothing when there are no savings in a period. source (opens in a new tab)

Does it see my code?

Requests pass through its servers, but prompts, code and responses are not stored; only model, token and cost metadata. source (opens in a new tab)

What happens at the $5 limit?

Your tool shows an error asking you to add a card, then continues where it left off. source (opens in a new tab)

How do I connect Claude Code?

Set ANTHROPIC_BASE_URL in your settings or shell profile. source (opens in a new tab)

Sources and review methodology

Official sources and verification dates

PromptUnit homepage and pricing section homepage · checked Oct 1, 2026
PromptUnit documentation homepage · checked Oct 1, 2026
PromptUnit privacy policy · checked Oct 1, 2026

Not verified: US availability; Routing model list.

How we documented and maintain this page

Every fact about PromptUnit above comes from the 3 official pages listed here, last compared on Oct 1, 2026; we have not run PromptUnit ourselves, so it has no editorial score. How we check and re-check pages.

Article updated Oct 10, 2026; prices checked Oct 1, 2026. Outbound links to vendors are plain links; we do not earn commissions. How we review · Report an error