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Handle None input_tokens from Anthropic SDK #1674

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Handle None input_tokens from Anthropic SDK #1674

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2 changes: 1 addition & 1 deletion pydantic_ai_slim/pydantic_ai/models/anthropic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -418,7 +418,7 @@ def _map_usage(message: AnthropicMessage | RawMessageStreamEvent) -> usage.Usage
# Tokens are only counted once between input_tokens, cache_creation_input_tokens, and cache_read_input_tokens
# This approach maintains request_tokens as the count of all input tokens, with cached counts as details
request_tokens = (
getattr(response_usage, 'input_tokens', 0)
(getattr(response_usage, 'input_tokens', 0) or 0)
+ (getattr(response_usage, 'cache_creation_input_tokens', 0) or 0) # These can be missing, None, or int
+ (getattr(response_usage, 'cache_read_input_tokens', 0) or 0)
)
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