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PythonlangsmithtypesthreadThreadtotal_cost_details
Attribute●Since v0.14

total_cost_details

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total_cost_details: Optional[Dict[str, float]] = None
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total_cost_details sums per-category estimated USD cost across traces in the thread. Keys mirror total_token_details.

Example: {"cache_read": 0.012, "reasoning": 0.008}.