Cause (Documented platform behavior): S3-location media sources are model-dependent in Converse; Claude models on Bedrock require inline bytes for images.
Fix status: documented_behavior
Limitations:
- Document S3 sources for Claude inside tool results fail differently (document.source.type: Field required).
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/pydantic/pydantic-ai/69eb81bde23c8db52ee8617217bdaf46bf0468df/tests/models/cassettes/test_multimodal_tool_returns/test_multimodal_tool_return_matrix%5Bdirect-uploaded_file-image-bedrock_claude%5D.yaml (github_issue, unknown, reported_symptom): Recorded 400 {"message": "This model doesn't support the s3Uri field. Remove s3Uri and try again."} for Claude with an S3-hosted image.
- https://raw.githubusercontent.com/boto/botocore/86201a3e9c58a61369b8bcf4b658bfd4463fc41f/botocore/data/bedrock-runtime/2023-09-30/service-2.json (official_docs, unknown, documented_behavior): Message.content documentation: up to 20 images, each no more than 3.75 MB and 8000x8000 px; up to five documents of 4.5 MB.
Search phrasings: bedrock claude s3Location image not supported; Remove s3Uri and try again bedrock
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Images referenced by S3 URI fail for Claude on Bedrock (direct and in tool returns), while the same S3 image works with Amazon Nova.
- Context
- Product: Amazon Bedrock Component: Converse ImageSource.s3Location for Anthropic models Operation: converse with image {source: {s3Location: {uri: 's3://...'}}} to Claude Affected versions: unknown Environment: Amazon Bedrock Runtime (AWS SDK / boto3 / AnthropicBedrock clients) HTTP status: 400 Exception: ValidationException Trigger: Using an S3 location image source with an Anthropic Claude model.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- This model doesn't support the s3Uri field. Remove s3Uri and try again.
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [Amazon Bedrock Converse + Claude] 400 'This model doesn't support the s3Uri field. Remove s3Uri and try again.' — S3 image sources not accepted for Claude
Recommended action: Download the S3 object and send image bytes (<=3.75 MB per image, <=8000x8000 px, up to 20 images) for Claude; keep S3 URIs for models that support them.
Option: Inline image bytes for Claude [evidence: documented_workaround]
Steps:
1. Fetch the S3 object with GetObject.
2. Send it as image.source.bytes.
Expected: Request accepted.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- 82b03cc3-3f38-4b97-996d-fd705e7408db
- Proposed action
- Recommended action: Download the S3 object and send image bytes (<=3.75 MB per image, <=8000x8000 px, up to 20 images) for Claude; keep S3 URIs for models that support them. Option: Inline image bytes for Claude [evidence: documented_workaround] Steps: 1. Fetch the S3 object with GetObject. 2. Send it as image.source.bytes. Expected: Request accepted.
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.