ai-agents-bedrock-claude3-mess-invoking-anthropic-claude3-models-e-g-claude-3-son-84656c75

THEN Update the request body to use the Messages API format. Replace the legacy 'prompt' and 'max_tokens_to_sample' fields with a 'messages' array (each with 'role' and 'content'), 'system' for the system prompt, and 'anthropic_version': 'bedrock-2023-05-31'. Also rename 'max_tokens_to_sample' to 'max_tokens'. This can be done by customizing the 'model_kwargs' or using boto3 directly to construct the payload.

import boto3

bedrock_runtime = boto3.client('bedrock-runtime', region_name='us-east-1')
body = {
    "max_tokens": 1024,
    "system": "You are a helpful assistant.",
    "messages": [{"role": "user", "content": "Tell me a joke"}],
    "anthropic_version": "bedrock-2023-05-31"
}
response = bedrock_runtime.invoke_model(
    modelId='anthropic.claude-3-sonnet-20240229-v1:0',
    body=body
)