3rd-party platforms

Claude on Amazon Bedrock

Anthropic's Claude models are now generally available through Amazon Bedrock.

This page covers the Amazon Bedrock integration available today (the InvokeModel and Converse APIs with ARN-versioned model identifiers and AWS event-stream encoding). A research preview of a new AWS-managed offering, with the Messages API at /anthropic/v1/messages and SSE streaming, is documented at Claude in Amazon Bedrock (research preview).

Calling Claude through Bedrock slightly differs from how you would call Claude when using Anthropic's client SDKs. This guide walks you through completing an API call to Claude on Bedrock using one of Anthropic's client SDKs.

Note that this guide assumes you have already signed up for an AWS account and configured programmatic access.

Install and configure the AWS CLI

Install a version of the AWS CLI at or newer than version 2.13.23
Configure your AWS credentials using the AWS configure command (see Configure the AWS CLI) or find your credentials by navigating to "Command line or programmatic access" within your AWS dashboard and following the directions in the popup modal.
Verify that your credentials are working:

Shell

aws sts get-caller-identity

Install an SDK for accessing Bedrock

Anthropic's client SDKs support Bedrock. You can also use an AWS SDK like boto3 directly.

Accessing Bedrock

Subscribe to Anthropic models

Go to the AWS Console > Bedrock > Model Access and request access to Anthropic models. Note that Anthropic model availability varies by region. See AWS documentation for latest information.

API model IDs

Model	Base Bedrock model ID	`global`	`us`	`eu`	`jp`	`apac`
Claude Opus 4.6	anthropic.claude-opus-4-6-v1	Yes	Yes	Yes	Yes	Yes
Claude Sonnet 4.6	anthropic.claude-sonnet-4-6	Yes	Yes	Yes	Yes	No
Claude Sonnet 4.5	anthropic.claude-sonnet-4-5-20250929-v1:0	Yes

For more information about regional vs global model IDs, see the Global vs regional endpoints section below.

List available models

The following examples show how to print a list of all the Claude models available through Bedrock:

Making requests

The following examples show how to generate text from Claude on Bedrock:

See the client SDKs for more details, and the official Bedrock documentation.

Bearer token authentication

You can authenticate with Bedrock using bearer tokens instead of AWS credentials. This is useful in corporate environments where teams need access to Bedrock without managing AWS credentials, IAM roles, or account-level permissions.

Bearer token authentication is supported in the C#, Go, and Java SDKs. The PHP, Python, TypeScript, and Ruby SDKs use AWS SigV4 signing only.

The simplest approach is to set the AWS_BEARER_TOKEN_BEDROCK environment variable, which is automatically detected by fromEnv() credential resolution.

To provide a token programmatically:

Activity logging

Bedrock provides an invocation logging service that allows customers to log the prompts and completions associated with your usage.

Anthropic recommends that you log your activity on at least a 30-day rolling basis in order to understand your activity and investigate any potential misuse.

Turning on this service does not give AWS or Anthropic any access to your content.

Feature support

For all currently supported features on Bedrock, see API features overview.

PDF support on Bedrock

PDF support is available on Amazon Bedrock through both the Converse API and InvokeModel API. For detailed information about PDF processing capabilities and limitations, see the PDF support documentation.

Important considerations for Converse API users:

Visual PDF analysis (charts, images, layouts) requires citations to be enabled
Without citations, only basic text extraction is available
For full control without forced citations, use the InvokeModel API

For more details on the two document processing modes and their limitations, refer to the PDF support guide.

Context window

Claude Opus 4.6 and Claude Sonnet 4.6 have a 1M-token context window on Amazon Bedrock. Other Claude models, including Sonnet 4.5 and Sonnet 4, have a 200k-token context window.

Amazon Bedrock limits request payloads to 20 MB. When sending large documents or many images, you may reach this limit before the token limit.

Global vs regional endpoints

Starting with Claude Sonnet 4.5 and all future models, Amazon Bedrock offers two endpoint types:

Global endpoints: Dynamic routing for maximum availability
Regional endpoints: Guaranteed data routing through specific geographic regions

Regional endpoints include a 10% pricing premium over global endpoints.

This applies to Claude Sonnet 4.5 and future models only. Older models (Claude Sonnet 4, Opus 4, and earlier) maintain their existing pricing structures.

When to use each option

Global endpoints (recommended):

Provide maximum availability and uptime
Dynamically route requests to regions with available capacity
No pricing premium
Best for applications where data residency is flexible

Regional endpoints (CRIS):

Route traffic through specific geographic regions
Required for data residency and compliance requirements
Available for US, EU, Japan, and Australia
10% pricing premium reflects infrastructure costs for dedicated regional capacity

Implementation

Using global endpoints (default for Opus 4.6, Sonnet 4.5, and Sonnet 4):

The model IDs for Claude Sonnet 4.5 and 4 already include the global. prefix:

Using regional endpoints (CRIS):

To use regional endpoints, remove the global. prefix from the model ID:

Claude Mythos Preview is a research preview model available to invited customers on Amazon Bedrock. For more information, see Project Glasswing.

Additional resources

AWS Bedrock pricing: aws.amazon.com/bedrock/pricing
AWS pricing documentation: Bedrock pricing guide
AWS blog post: Introducing Claude Sonnet 4.5 in Amazon Bedrock
Anthropic pricing details: Pricing documentation

Was this page helpful?

3rd-party platforms

Claude on Amazon Bedrock

Anthropic's Claude models are now generally available through Amazon Bedrock.

Note that this guide assumes you have already signed up for an AWS account and configured programmatic access.

Install and configure the AWS CLI

Install a version of the AWS CLI at or newer than version 2.13.23
Configure your AWS credentials using the AWS configure command (see Configure the AWS CLI) or find your credentials by navigating to "Command line or programmatic access" within your AWS dashboard and following the directions in the popup modal.
Verify that your credentials are working:

Shell

aws sts get-caller-identity

Install an SDK for accessing Bedrock

Anthropic's client SDKs support Bedrock. You can also use an AWS SDK like boto3 directly.

Accessing Bedrock

Subscribe to Anthropic models

Go to the AWS Console > Bedrock > Model Access and request access to Anthropic models. Note that Anthropic model availability varies by region. See AWS documentation for latest information.

API model IDs

Model	Base Bedrock model ID	`global`	`us`	`eu`	`jp`	`apac`
Claude Opus 4.6	anthropic.claude-opus-4-6-v1	Yes	Yes	Yes	Yes	Yes
Claude Sonnet 4.6	anthropic.claude-sonnet-4-6	Yes	Yes	Yes	Yes	No
Claude Sonnet 4.5	anthropic.claude-sonnet-4-5-20250929-v1:0	Yes

For more information about regional vs global model IDs, see the Global vs regional endpoints section below.

List available models

The following examples show how to print a list of all the Claude models available through Bedrock:

Making requests

The following examples show how to generate text from Claude on Bedrock:

See the client SDKs for more details, and the official Bedrock documentation.

Bearer token authentication

Bearer token authentication is supported in the C#, Go, and Java SDKs. The PHP, Python, TypeScript, and Ruby SDKs use AWS SigV4 signing only.

The simplest approach is to set the AWS_BEARER_TOKEN_BEDROCK environment variable, which is automatically detected by fromEnv() credential resolution.

To provide a token programmatically:

Activity logging

Bedrock provides an invocation logging service that allows customers to log the prompts and completions associated with your usage.

Anthropic recommends that you log your activity on at least a 30-day rolling basis in order to understand your activity and investigate any potential misuse.

Turning on this service does not give AWS or Anthropic any access to your content.

Feature support

For all currently supported features on Bedrock, see API features overview.

PDF support on Bedrock

Important considerations for Converse API users:

Visual PDF analysis (charts, images, layouts) requires citations to be enabled
Without citations, only basic text extraction is available
For full control without forced citations, use the InvokeModel API

For more details on the two document processing modes and their limitations, refer to the PDF support guide.

Context window

Claude Opus 4.6 and Claude Sonnet 4.6 have a 1M-token context window on Amazon Bedrock. Other Claude models, including Sonnet 4.5 and Sonnet 4, have a 200k-token context window.

Amazon Bedrock limits request payloads to 20 MB. When sending large documents or many images, you may reach this limit before the token limit.

Global vs regional endpoints

Starting with Claude Sonnet 4.5 and all future models, Amazon Bedrock offers two endpoint types:

Global endpoints: Dynamic routing for maximum availability
Regional endpoints: Guaranteed data routing through specific geographic regions

Regional endpoints include a 10% pricing premium over global endpoints.

This applies to Claude Sonnet 4.5 and future models only. Older models (Claude Sonnet 4, Opus 4, and earlier) maintain their existing pricing structures.

When to use each option

Global endpoints (recommended):

Provide maximum availability and uptime
Dynamically route requests to regions with available capacity
No pricing premium
Best for applications where data residency is flexible

Regional endpoints (CRIS):

Route traffic through specific geographic regions
Required for data residency and compliance requirements
Available for US, EU, Japan, and Australia
10% pricing premium reflects infrastructure costs for dedicated regional capacity

Implementation

Using global endpoints (default for Opus 4.6, Sonnet 4.5, and Sonnet 4):

The model IDs for Claude Sonnet 4.5 and 4 already include the global. prefix:

Using regional endpoints (CRIS):

To use regional endpoints, remove the global. prefix from the model ID:

Claude Mythos Preview is a research preview model available to invited customers on Amazon Bedrock. For more information, see Project Glasswing.

Additional resources

AWS Bedrock pricing: aws.amazon.com/bedrock/pricing
AWS pricing documentation: Bedrock pricing guide
AWS blog post: Introducing Claude Sonnet 4.5 in Amazon Bedrock
Anthropic pricing details: Pricing documentation

Was this page helpful?

using Anthropic.Bedrock;
using Anthropic.Models.Messages;

var client = new AnthropicBedrockClient(
    new AnthropicBedrockApiTokenCredentials
    {
        BearerToken = "your-bearer-token",
        Region = "us-east-1",
    }
);

var response = await client.Messages.Create(new MessageCreateParams
{
    Model = "us.anthropic.claude-sonnet-4-5-20250929-v1:0",
    MaxTokens = 1024,
    Messages = [new() { Role = Role.User, Content = "Hello!" }],
});