Invoke the specified Amazon Bedrock model to run inference using the prompt and inference parameters provided in the request body¶

Description¶

Invoke the specified Amazon Bedrock model to run inference using the prompt and inference parameters provided in the request body. The response is returned in a stream.

To see if a model supports streaming, call GetFoundationModel and check the responseStreamingSupported field in the response.

The CLI doesn't support streaming operations in Amazon Bedrock, including invoke_model_with_response_stream.

For example code, see Invoke model with streaming code example in the Amazon Bedrock User Guide.

This operation requires permissions to perform the bedrock:InvokeModelWithResponseStream action.

To deny all inference access to resources that you specify in the modelId field, you need to deny access to the bedrock:InvokeModel and bedrock:InvokeModelWithResponseStream actions. Doing this also denies access to the resource through the Converse API actions (converse and converse_stream). For more information see Deny access for inference on specific models.

For troubleshooting some of the common errors you might encounter when using the invoke_model_with_response_stream API, see Troubleshooting Amazon Bedrock API Error Codes in the Amazon Bedrock User Guide

Usage¶

bedrockruntime_invoke_model_with_response_stream(body, contentType,
  accept, modelId, trace, guardrailIdentifier, guardrailVersion,
  performanceConfigLatency, serviceTier, requestMetadata)

Arguments¶

• body

The prompt and inference parameters in the format specified in the contentType in the header. You must provide the body in JSON format. To see the format and content of the request and response bodies for different models, refer to Inference parameters. For more information, see Run inference in the Bedrock User Guide.

• contentType

The MIME type of the input data in the request. You must specify application/json.

• accept

The desired MIME type of the inference body in the response. The default value is application/json.

• modelId

[required] The unique identifier of the model to invoke to run inference.

The modelId to provide depends on the type of model or throughput that you use:

• If you use a base model, specify the model ID or its ARN. For a list of model IDs for base models, see Amazon Bedrock base model IDs (on-demand throughput) in the Amazon Bedrock User Guide.
• If you use an inference profile, specify the inference profile ID or its ARN. For a list of inference profile IDs, see Supported Regions and models for cross-region inference in the Amazon Bedrock User Guide.
• If you use a provisioned model, specify the ARN of the Provisioned Throughput. For more information, see Run inference using a Provisioned Throughput in the Amazon Bedrock User Guide.
• If you use a custom model, specify the ARN of the custom model deployment (for on-demand inference) or the ARN of your provisioned model (for Provisioned Throughput). For more information, see Use a custom model in Amazon Bedrock in the Amazon Bedrock User Guide.

• If you use an imported model, specify the ARN of the imported model. You can get the model ARN from a successful call to CreateModelImportJob or from the Imported models page in the Amazon Bedrock console.

• trace

Specifies whether to enable or disable the Bedrock trace. If enabled, you can see the full Bedrock trace.

• guardrailIdentifier

The unique identifier of the guardrail that you want to use. If you don't provide a value, no guardrail is applied to the invocation.

An error is thrown in the following situations.

• You don't provide a guardrail identifier but you specify the amazon-bedrock-guardrailConfig field in the request body.
• You enable the guardrail but the contentType isn't application/json.

• You provide a guardrail identifier, but guardrailVersion isn't specified.

• guardrailVersion

The version number for the guardrail. The value can also be DRAFT.

• performanceConfigLatency

Model performance settings for the request.

• serviceTier

Specifies the processing tier type used for serving the request.

• requestMetadata

Key-value pairs that you can use to filter invocation logs.

Value¶

A list with the following syntax:

list(
  body = list(
    chunk = list(
      bytes = raw
    ),
    internalServerException = list(
      message = "string"
    ),
    modelStreamErrorException = list(
      message = "string",
      originalStatusCode = 123,
      originalMessage = "string"
    ),
    validationException = list(
      message = "string"
    ),
    throttlingException = list(
      message = "string"
    ),
    modelTimeoutException = list(
      message = "string"
    ),
    serviceUnavailableException = list(
      message = "string"
    )
  ),
  contentType = "string",
  performanceConfigLatency = "standard"|"optimized",
  serviceTier = "priority"|"default"|"flex"|"reserved"
)

Request syntax¶

svc$invoke_model_with_response_stream(
  body = raw,
  contentType = "string",
  accept = "string",
  modelId = "string",
  trace = "ENABLED"|"DISABLED"|"ENABLED_FULL",
  guardrailIdentifier = "string",
  guardrailVersion = "string",
  performanceConfigLatency = "standard"|"optimized",
  serviceTier = "priority"|"default"|"flex"|"reserved",
  requestMetadata = "string"
)