---
title: "Create Comparative Experiment"
method: POST
path: "/api/v1/datasets/comparative"
tags: ["datasets"]
---

# Create Comparative Experiment

`POST /api/v1/datasets/comparative`

Create a comparative experiment.

## Request body

- ComparativeExperimentCreate — Create class for ComparativeExperiment.
  - `id` string, uuid
  - `experiment_ids` string[], required
  - `name` string, nullable
  - `description` string, nullable
  - `created_at` string, date-time
  - `modified_at` string, date-time
  - `reference_dataset_id` string, uuid, nullable
  - `extra` object, nullable

## Response `200`

Successful Response

- ComparativeExperimentBase — ComparativeExperiment schema.
  - `id` string, uuid, required
  - `name` string, nullable
  - `description` string, nullable
  - `tenant_id` string, uuid, required
  - `created_at` string, date-time, required
  - `modified_at` string, date-time, required
  - `reference_dataset_id` string, uuid, required
  - `extra` object, nullable

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/langchain-ai/apis/langsmith.md) · [All operations](https://skmtc.net/langchain-ai/apis/langsmith/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/langchain-ai/langsmith/versions/a0acb3a6a101/schema)