---
title: "Label Comparison"
method: POST
path: "/preference/comparisons/{comparison_id}/labels"
tags: ["preference"]
---

# Label Comparison

`POST /preference/comparisons/{comparison_id}/labels`

## Request

- Base URL: `https://api.os3robotics.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.os3robotics.com/preference/comparisons/{comparison_id}/labels`
- Auth: one of:
  - HTTP bearer
  - HTTP bearer

## Path parameters

- `comparison_id` string, uuid, required

## Request body

- ComparisonLabelIn
  - `outcome` 'a' | 'b' | 'tie' | 'both_bad' | 'cannot_judge', required
  - `reason` 'accuracy' | 'completeness' | 'clarity' | 'relevance' | 'other'
  - `correction` string, nullable
  - `note` string, nullable

## Response `201`

Successful Response

- Vote
  - `id` integer, required
  - `comparison_id` string, uuid, required
  - `outcome` string, required
  - `reason` string, nullable, required
  - `correction` string, nullable, required
  - `note` string, nullable, required
  - `actor_kind` string, required
  - `actor_id` string, required
  - `actor_name` string, nullable, required
  - `created_at` string, date-time, required

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/os3robotics/apis/os3-api.md) - [All operations](https://skmtc.dev/os3robotics/apis/os3-api/llms.txt) - [OpenAPI document](https://skmtc.dev/os3robotics/apis/os3-api/revisions/af32cd4f14bb?raw)