---
title: "Get Auto Router Classifier Default Prompt"
method: GET
path: "/auto_router/classifier/default_prompt"
tags: ["model management"]
---

# Get Auto Router Classifier Default Prompt

`GET /auto_router/classifier/default_prompt`

Get the built-in system prompt used by an auto-router's LLM classifier

## Query parameters

- `context_window_size` integer
- `tier_labels` string, nullable
- `classification_rubric` 'legacy' | 'agentic' | 'chat' | 'business' — Which calibration examples, and for BUSINESS which tier criteria, the built-in classifier rubric carries.

## Response `200`

Successful Response

- AutoRouterClassifierDefaultPromptResponse — The built-in system prompt an auto-router's LLM classifier uses when none is configured. Served so the dashboard's prompt editor prefills the rubric the proxy actually sends, rather than a copy in the frontend that drifts the moment the rubric is edited.
  - `system_prompt` string, required

## Other responses

- `422` — Validation Error

## Changes

- **2026-09-18** `082b5fabd909` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/flock/apis/litellm-api/changes/auto_router/classifier/default_prompt/get.md)

---

[API](https://skmtc.dev/flock/apis/litellm-api.md) · [All operations](https://skmtc.dev/flock/apis/litellm-api/llms.txt) · [OpenAPI document](https://skmtc.dev/flock/apis/litellm-api/revisions/b694deb1e459?raw)