{
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  "generation": "free-expression-20261012",
  "currency": "USD",
  "price_source": "config.toml",
  "price_snapshot": {
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    "price_cache_read": 0.33,
    "price_cache_write": 4.125
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  "estimated_final_response_usd": 0.0656139,
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  "unknown_usage_attempts": 0,
  "missing_duration_attempts": 0,
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  "tokens": {
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    "cache_read_tokens": 0,
    "cache_write_tokens": 0
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  "complete_request_estimate": true,
  "excludes": [
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    "historical_generations",
    "taxes_and_discounts",
    "requests_without_returned_usage"
  ],
  "attempts": [
    {
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      "request_id": "34a1efdc-a53c-407a-b373-92b11197bb18",
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}