Data residency

Claude Platform on AWS supports the following inference geographies:

• US: Inference stays within US data centers. A 1.1x pricing multiplier applies.

• Global: Inference can route to any Anthropic-operated data center worldwide. Standard pricing applies.

  The AWS region your workspace is bound to controls which gateway endpoint you call and where AWS-side resources (IAM, CloudTrail, billing) are scoped. It does not pin where model inference runs. To pin inference to a specific geography, set inference_geo on each request or configure a workspace default.

Set the inference geography per request with the inference_geo parameter:

The inference_geo parameter is supported on Claude 4.6 and later models. Requests with inference_geo on Claude Opus 4.5, Claude Sonnet 4.5, or Claude Haiku 4.5 return a 400 error. See Data residency for model availability details.

# Replace us-west-2 with your AWS region in both the URL and --aws-sigv4
# Omit the x-amz-security-token header if you use long-term IAM user credentials
curl "https://aws-external-anthropic.us-west-2.api.aws/v1/messages" \
  --aws-sigv4 "aws:amz:us-west-2:aws-external-anthropic" \
  --user "$AWS_ACCESS_KEY_ID:$AWS_SECRET_ACCESS_KEY" \
  -H "x-amz-security-token: $AWS_SESSION_TOKEN" \
  -H "content-type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -H "anthropic-workspace-id: $ANTHROPIC_AWS_WORKSPACE_ID" \
  -d '{
    "model": "claude-sonnet-5",
    "max_tokens": 1024,
    "inference_geo": "us",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

# Replace us-west-2 with your AWS region
# ant reads ANTHROPIC_API_KEY and sends it as x-api-key. Generate a key in the
# AWS Console (see API key authentication).
export ANTHROPIC_API_KEY="YOUR_AWS_API_KEY"

ant messages create \
  --base-url https://aws-external-anthropic.us-west-2.api.aws \
  --workspace-id "$ANTHROPIC_AWS_WORKSPACE_ID" \
  --model claude-sonnet-5 \
  --max-tokens 1024 \
  --inference-geo us \
  --message '{role: user, content: "Hello!"}' \
  --transform content

from anthropic import AnthropicAWS

client = AnthropicAWS()
message = client.messages.create(
    model="claude-sonnet-5",
    max_tokens=1024,
    inference_geo="us",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(message)

import AnthropicAws from "@anthropic-ai/aws-sdk";
const client = new AnthropicAws();
const message = await client.messages.create({
  model: "claude-sonnet-5",
  max_tokens: 1024,
  inference_geo: "us",
  messages: [{ role: "user", content: "Hello!" }]
});
console.log(message);

using Anthropic;
using Anthropic.Aws;

var client = new AnthropicAwsClient();

var message = await client.Messages.Create(new()
{
    Model = Model.ClaudeSonnet5,
    MaxTokens = 1024,
    InferenceGeo = "us",
    Messages = [new() { Role = Role.User, Content = "Hello!" }]
});

Console.WriteLine(message);

client, err := anthropicaws.NewClient(context.Background(), anthropicaws.ClientConfig{})
if err != nil {
	panic(err)
}

message, err := client.Messages.New(context.Background(), anthropic.MessageNewParams{
	Model:        anthropic.ModelClaudeSonnet5,
	MaxTokens:    1024,
	InferenceGeo: anthropic.String("us"),
	Messages: []anthropic.MessageParam{
		anthropic.NewUserMessage(anthropic.NewTextBlock("Hello!")),
	},
})
if err != nil {
	panic(err)
}

fmt.Println(message)

import com.anthropic.aws.backends.AwsBackend;
import com.anthropic.client.AnthropicClient;
import com.anthropic.client.okhttp.AnthropicOkHttpClient;
import com.anthropic.models.messages.Message;
import com.anthropic.models.messages.MessageCreateParams;
import com.anthropic.models.messages.Model;

void main() {
    AnthropicClient client = AnthropicOkHttpClient.builder()
        .backend(AwsBackend.fromEnv())
        .build();

    Message message = client.messages().create(
        MessageCreateParams.builder()
            .model(Model.CLAUDE_SONNET_5)
            .maxTokens(1024)
            .inferenceGeo("us")
            .addUserMessage("Hello!")
            .build()
    );

    IO.println(message);
}

use Anthropic\Aws\Client;

$client = new Client();

$message = $client->messages->create(
    model: 'claude-sonnet-5',
    maxTokens: 1024,
    inferenceGeo: 'us',
    messages: [['role' => 'user', 'content' => 'Hello!']],
);

echo $message;

require "anthropic"

client = Anthropic::AWSClient.new

message = client.messages.create(
  model: "claude-sonnet-5",
  max_tokens: 1024,
  inference_geo: "us",
  messages: [{ role: "user", content: "Hello!" }]
)

puts message

If you omit inference_geo, the request uses the workspace's default_inference_geo if one is configured, otherwise global.

Workspace-level inference geography controls (allowed_inference_geos and default_inference_geo) are also available on Claude Platform on AWS. See Workspace-level restrictions.