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fix(mistral): preserve extended usage fields from API response #5693

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fix(mistral): preserve extended usage fields from API response #5693

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17 changes: 11 additions & 6 deletions pydantic_ai_slim/pydantic_ai/models/mistral.py
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Original file line number Diff line number Diff line change
Expand Up @@ -841,13 +841,18 @@ def _validate_required_json_schema(json_dict: dict[str, Any], json_schema: dict[

def _map_usage(response: MistralChatCompletionResponse | MistralCompletionChunk) -> RequestUsage:
"""Maps a Mistral Completion Chunk or Chat Completion Response to a Usage."""
if response.usage:
return RequestUsage(
input_tokens=response.usage.prompt_tokens or 0,
output_tokens=response.usage.completion_tokens or 0,
)
else:
if response.usage is None:
return RequestUsage()
usage_data = response.usage.model_dump(exclude_none=True)
known_keys = {'prompt_tokens', 'completion_tokens', 'total_tokens'}
details: dict[str, int] | None = {
k: v for k, v in usage_data.items() if k not in known_keys and isinstance(v, int)
} or None
return RequestUsage(
input_tokens=usage_data.get('prompt_tokens', 0),
output_tokens=usage_data.get('completion_tokens', 0),
details=details,
)


def _map_content(content: MistralOptionalNullable[MistralContent]) -> tuple[str | None, list[str]]:
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