AWS Bedrock: invoke a foundation model with InvokeModel

domain: docs.aws.amazon.com/bedrock · 6 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed

Verified steps

  1. Ensure the IAM principal has the bedrock:InvokeModel permission and that the target model has been enabled in the Bedrock console for your region.
  2. Instantiate a boto3 client for the 'bedrock-runtime' service (not 'bedrock') in the desired region.
  3. Construct the request body as a JSON-serializable dict whose schema matches the specific model provider's format (e.g., Anthropic Claude expects an 'anthropic_version' field and a 'messages' array).
  4. Call client.invoke_model(modelId=MODEL_ID, body=json.dumps(body), contentType='application/json', accept='application/json').
  5. Read and decode the response: json.loads(response['body'].read()) to get the completion.
  6. Handle throttling exceptions (ThrottlingException) with exponential backoff, as on-demand throughput can be rate-limited.

Known gotchas

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