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See which customers your AI is losing money on.

OpenAI sends one bill. CostSlice shows cost by customer and by feature.

Start freeSee a sample

Starter is free. No card. Keep your OpenAI API key. We never store prompts or completions.

acme-health · this month

clinical-summary · prod

UnprofitableSample data

This customer is unprofitable.

Cost vs plan

2.0×

How it works

A pass-through OpenAI proxy, then a customer P&L. Not an AI gateway.

  1. 01

    Point

    Point your OpenAI client at CostSlice. Keep your OpenAI API key. Send a CostSlice key next to it.

  2. 02

    Tag

    Put an opaque customer ID, the feature, and the env on each request. A missing tag still completes. Starter at 10,000 requests: new proxy calls stop until you upgrade.

  3. 03

    See

    Cost versus plan, per customer and per feature. Then change the price.

10-minute setup →

Worked examples

Which customers burn margin — what the P&L shows

Invented workspace examples. Not testimonials.

Acme support bot · acme_prod · chat

Example

spend $842 · revenue $410 · margin −$432

Lesson: Untagged + chatty tenant; tag x-cs-tenant/feature or reprice.

Docs search · docs_search · rag

Example

spend $126 · revenue $390 · margin +$264

Lesson: Healthy row; don’t bury under org totals.

Staging leak · untagged · staging

Example

spend $218 · revenue $0 · margin −$218

Lesson: Missing tags still complete; spend shows in untagged.

beta_co · summarize

Example

spend $95 · revenue $120 · margin +$25

Lesson: Small healthy row. Still a customer P&L line, not an org total.

Start free — see your first P&L row

Not the org bill

The OpenAI usage dashboard is one bill. It is not cost per customer.

OpenAI Costs/Usage group by project/key — not tenant id. CostSlice keeps your key, tags tenant/feature/env, shows P&L row.

Start freeRead the comparisonRead the docs

One tagged call → first P&L row

Starter $0 · 10k · no card · never store prompts.

  1. 01

    Create a workspace and copy x-cs-key

    Sign in. Copy cs_live_…. That key identifies the org. Keep your OpenAI API key.

  2. 02

    Point base_url at the proxy

    Set the OpenAI client base_url to https://api.costslice.com/v1. Keep your OpenAI API key.

  3. 03

    Send Authorization plus the tags

    Authorization is your OpenAI API key. Add x-cs-key, x-cs-tenant, x-cs-feature, and x-cs-env on the request.

  4. 04

    Refresh the P&L

    Open Tenants. The tagged call is the first customer row. A missing tag still completes and lands in untagged. Starter at 10,000 requests: new proxy calls stop until you upgrade.

Start freeQuickstart

ROI sample

EXAMPLE

acme-health · LLM cost $4,812 · plan $2,400 · over plan $2,412

Published sample arithmetic. Not your live P&L. We do not claim a live aha.

Run the EXAMPLE worksheetSee the sample P&L

Starter is free. Most teams run on Pro.

No card on Starter. Overage on Pro and Scale is $6 / 100k requests.

Starter

$0

10,000 requests · 7-day retention · 1 seat · hard cap, no card

Start free

Pro

$79/mo

250,000 requests · 90-day retention · Unlimited seats · $6 / 100k overage

Start Pro

Scale

$199/mo

2,000,000 requests · 365-day retention · Unlimited seats · $6 / 100k overage

Start Scale