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Bedrock

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You are currently on a page documenting the use of Amazon Bedrock models as text completion models. Many popular models available on Bedrock are chat completion models.

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Amazon Bedrock is a fully managed service that makes Foundation Models (FMs) from leading AI startups and Amazon available via an API. You can choose from a wide range of FMs to find the model that is best suited for your use case.

Setup​

You'll need to install a few official AWS packages as peer dependencies:

npm install @aws-crypto/sha256-js @aws-sdk/credential-provider-node @smithy/protocol-http @smithy/signature-v4 @smithy/eventstream-codec @smithy/util-utf8 @aws-sdk/types

You can also use Bedrock in web environments such as Edge functions or Cloudflare Workers by omitting the @aws-sdk/credential-provider-node dependency and using the web entrypoint:

npm install @aws-crypto/sha256-js @smithy/protocol-http @smithy/signature-v4 @smithy/eventstream-codec @smithy/util-utf8 @aws-sdk/types

Usage​

tip

See this section for general instructions on installing integration packages.

npm install @langchain/community

Note that some models require specific prompting techniques. For example, Anthropic's Claude-v2 model will throw an error if the prompt does not start with Human: .

import { Bedrock } from "@langchain/community/llms/bedrock";
// Or, from web environments:
// import { Bedrock } from "@langchain/community/llms/bedrock/web";

// If no credentials are provided, the default credentials from
// @aws-sdk/credential-provider-node will be used.
const model = new Bedrock({
  model: "ai21.j2-grande-instruct", // You can also do e.g. "anthropic.claude-v2"
  region: "us-east-1",
  // endpointUrl: "custom.amazonaws.com",
  // credentials: {
  //   accessKeyId: process.env.BEDROCK_AWS_ACCESS_KEY_ID!,
  //   secretAccessKey: process.env.BEDROCK_AWS_SECRET_ACCESS_KEY!,
  // },
  // modelKwargs: {},
});

const res = await model.invoke("Tell me a joke");
console.log(res);

/*


  Why was the math book unhappy?

  Because it had too many problems!
*/

API Reference:

  • Bedrock from @langchain/community/llms/bedrock

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