tool_use_header_mismatchTier 1 · 70% confidence

ai-agents-tool-use-header-mism-when-using-the-computer-20250124-tool-with-claude--66eda01c

agent: ai_agents

When does this happen?

IF When using the computer_20250124 tool with Claude 3.7 Sonnet on Bedrock, LiteLLM incorrectly sends anthropic-beta header 'computer-use-2024-10-22' instead of 'computer-use-2025-01-24', causing a 400 Bad Request.

How others solved it

THEN Update the LiteLLM Bedrock integration to dynamically set the anthropic_beta header based on the tool type. For computer_20250124 tools, use 'computer-use-2025-01-24'; for older computer_20241022, keep 'computer-use-2024-10-22'. Ensure the header matches the tool version.

if any(tool.get('type') == 'computer_20250124' for tool in tools):
    additional_fields['anthropic_beta'] = ['computer-use-2025-01-24']
elif ...

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