Message Batches API

Overview

The Message Batches API processes large volumes of Claude requests asynchronously at 50% of standard API cost. Ideal for bulk classification, extraction, scoring, and review tasks where latency tolerance allows batch processing.

Core Workflow

Create batch -> Poll status -> Retrieve results
     |              |               |
  POST /batches   GET /batches/{id}  GET /batches/{id}/results

Creating a Batch

import anthropic
import json