---
title: "Get per-model breakdown"
method: GET
path: "/api/v1/usage/breakdown"
tags: ["Usage"]
---

# Get per-model breakdown

`GET /api/v1/usage/breakdown`

Returns per-model token/cost/carbon/energy rollups (with `percentage` share of total tokens) for the requested date range, optionally scoped to a project.

## Query parameters

- `range` '7d' | '30d' | '90d' | '365d'
- `startDate` string
- `endDate` string
- `projectId` string, uuid

## Response `200`

Per-model breakdown

- object
  - `success` true, required
  - `data` UsageBreakdownItem[], required
    - `model` string, required
    - `promptTokens` number, required
    - `completionTokens` number, required
    - `totalTokens` number, required
    - `requestCount` number, required
    - `costUsd` number, required
    - `percentage` number, required
    - `carbonKg` number, required
    - `offsetCostUsd` number, nullable, required — Deprecated. Returns null after the AIW-13 pricing cutover.
    - `electricityKwh` number, required

## Other responses

- `400` — Bad request — validation failed or malformed JSON body
- `401` — Unauthorized — token missing, expired, or invalid
- `429` — Too many requests — rate limit exceeded
- `500` — Internal server error

---

[API](https://skmtc.net/crbonfree/apis/crbonfree-api.md) · [All operations](https://skmtc.net/crbonfree/apis/crbonfree-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/crbonfree/crbonfree-api/versions/29b71b1664e7/schema)