---
title: "Get Cost Efficiency"
method: GET
path: "/costs/efficiency"
---

# Get Cost Efficiency

`GET /costs/efficiency`

Real-time cost-per-line-of-code efficiency metric.

Shows cost efficiency as the run progresses:
- **current**: efficiency of the most recently completed task
- **run_average**: efficiency across all completed tasks in this run
- **historical_average**: efficiency across all tracked runs

Helps identify unusually expensive runs.

Returns:
    JSON with ``current``, ``run_average``, ``historical_average``, and
    ``message`` fields.

## Response `200`

Successful Response

- unknown

## Changes

> 15 revisions in range; 7 could not be searched.

- **2026-07-26** `2a1299ef19fa` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/sipyourdrink-ltd/apis/bernstein-task-server/changes/costs/efficiency/get.md)

---

[API](https://skmtc.dev/sipyourdrink-ltd/apis/bernstein-task-server.md) · [All operations](https://skmtc.dev/sipyourdrink-ltd/apis/bernstein-task-server/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sipyourdrink-ltd/bernstein-task-server/revisions/7f4871ff054a/schema)