Claude Platform Docs

Create a Message Batch

$client->messages->batches->create(list<Request> requests, ?string userProfileID, ?string workspaceID): MessageBatch
POST/v1/messages/batches

Send a batch of Message creation requests.

The Message Batches API can be used to process multiple Messages API requests at once. Once a Message Batch is created, it begins processing immediately. Batches can take up to 24 hours to complete.

Learn more about the Message Batches API in our user guide

Parameters
requests: list<Request>

List of requests for prompt completion. Each is an individual request to create a Message.

userProfileID?:optional string

The user profile ID to attribute the requests in this batch to. Use when acting on behalf of a party other than your organization. Requires the user-profiles beta header. Applies to every request in the batch; an individual request whose user_profile_id body field conflicts with this header is errored.

workspaceID?:optional string
Returns
class MessageBatch { $type = 'message_batch'; $id; $archivedAt; /* 7 more */ }
"message_batch" type

Object type.

For Message Batches, this is always "message_batch".

string id

Unique object identifier.

The format and length of IDs may change over time.

?\Datetime archivedAt

RFC 3339 datetime string representing the time at which the Message Batch was archived and its results became unavailable.

?\Datetime cancelInitiatedAt

RFC 3339 datetime string representing the time at which cancellation was initiated for the Message Batch. Specified only if cancellation was initiated.

\Datetime createdAt

RFC 3339 datetime string representing the time at which the Message Batch was created.

?\Datetime endedAt

RFC 3339 datetime string representing the time at which processing for the Message Batch ended. Specified only once processing ends.

Processing ends when every request in a Message Batch has either succeeded, errored, canceled, or expired.

\Datetime expiresAt

RFC 3339 datetime string representing the time at which the Message Batch will expire and end processing, which is 24 hours after creation.

ProcessingStatus processingStatus

Processing status of the Message Batch.

MessageBatchRequestCounts requestCounts

Tallies requests within the Message Batch, categorized by their status.

Requests start as processing and move to one of the other statuses only once processing of the entire batch ends. The sum of all values always matches the total number of requests in the batch.

?string resultsURL

URL to a .jsonl file containing the results of the Message Batch requests. Specified only once processing ends.

Results in the file are not guaranteed to be in the same order as requests. Use the custom_id field to match results to requests.

Create a Message Batch
<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

$client = new Client(apiKey: 'my-anthropic-api-key');

$messageBatch = $client->messages->batches->create(
  requests: [
    [
      'customID' => 'my-custom-id-1',
      'params' => [
        'maxTokens' => 1024,
        'messages' => [['content' => 'Hello, world', 'role' => 'user']],
        'model' => Model::CLAUDE_OPUS_5,
        'cacheControl' => ['type' => 'ephemeral', 'ttl' => '5m'],
        'container' => [
          'id' => 'id',
          'skills' => [
            ['skillID' => 'pdf', 'type' => 'anthropic', 'version' => 'latest']
          ],
        ],
        'inferenceGeo' => 'inference_geo',
        'metadata' => ['userID' => '13803d75-b4b5-4c3e-b2a2-6f21399b021b'],
        'outputConfig' => [
          'effort' => 'low',
          'format' => ['schema' => ['foo' => 'bar'], 'type' => 'json_schema'],
        ],
        'serviceTier' => 'auto',
        'stopSequences' => ['string'],
        'stream' => false,
        'system' => [
          [
            'text' => 'Today\'s date is 2024-06-01.',
            'type' => 'text',
            'cacheControl' => ['type' => 'ephemeral', 'ttl' => '5m'],
            'citations' => [
              [
                'citedText' => 'The grass is green. The sky is blue.',
                'documentIndex' => 0,
                'documentTitle' => 'x',
                'endCharIndex' => 0,
                'startCharIndex' => 0,
                'type' => 'char_location',
              ],
            ],
          ],
        ],
        'temperature' => 1,
        'thinking' => ['type' => 'adaptive', 'display' => 'summarized'],
        'toolChoice' => ['type' => 'auto', 'disableParallelToolUse' => true],
        'tools' => [
          [
            'inputSchema' => [
              'type' => 'object',
              'properties' => ['location' => 'bar', 'unit' => 'bar'],
              'required' => ['location'],
            ],
            'name' => 'name',
            'allowedCallers' => ['direct'],
            'cacheControl' => ['type' => 'ephemeral', 'ttl' => '5m'],
            'deferLoading' => true,
            'description' => 'Get the current weather in a given location',
            'eagerInputStreaming' => true,
            'inputExamples' => [['foo' => 'bar']],
            'strict' => true,
            'type' => 'custom',
          ],
        ],
        'topK' => 5,
        'topP' => 0.7,
      ],
    ],
  ],
  userProfileID: 'anthropic-user-profile-id',
  workspaceID: 'wrkspc_011CZkZaBF1tNoB5wlCeusgy',
);

var_dump($messageBatch);
Returns Examples
Response 200
{
  "id": "msgbatch_013Zva2CMHLNnXjNJJKqJ2EF",
  "archived_at": "2024-08-20T18:37:24.100435Z",
  "cancel_initiated_at": "2024-08-20T18:37:24.100435Z",
  "created_at": "2024-08-20T18:37:24.100435Z",
  "ended_at": "2024-08-20T18:37:24.100435Z",
  "expires_at": "2024-08-20T18:37:24.100435Z",
  "processing_status": "in_progress",
  "request_counts": {
    "canceled": 10,
    "errored": 30,
    "expired": 10,
    "processing": 100,
    "succeeded": 50
  },
  "results_url": "https://api.anthropic.com/v1/messages/batches/msgbatch_013Zva2CMHLNnXjNJJKqJ2EF/results",
  "type": "message_batch"
}