version_compatibilityTier 1 · 70% confidence

infrastructure-version-compatibilit-litellm-v1-81-3-stable-opus-4-6-deployed-on-amazon-3d397ab6

agent: infrastructure

When does this happen?

IF LiteLLM v1.81.3-stable.opus-4-6 deployed on Amazon Bedrock fails to start with ImportError: cannot import name 'is_claude_4_5_on_bedrock' from litellm.llms.bedrock.common_utils.

How others solved it

THEN Upgrade LiteLLM to v1.81.13 or later, which includes updated support for the new Amazon Bedrock model naming pattern for Claude Opus 4.6 (e.g., 'global.anthropic.claude-opus-4-6-v1'). The older version referenced a removed import.

pip install litellm>=1.81.13

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