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fix: add upstream inference cost tracking #158

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fix: add upstream inference cost tracking #158

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11 changes: 11 additions & 0 deletions src/chat/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -533,6 +533,17 @@ export class OpenRouterChatLanguageModel implements LanguageModelV2 {
};
}

const upstreamInferenceCost =
value.usage.cost_details?.upstream_inference_cost;
if (
upstreamInferenceCost != null &&
upstreamInferenceCost !== undefined
) {
openrouterUsage.costDetails = {
upstreamInferenceCost,
};
}

openrouterUsage.cost = value.usage.cost;
openrouterUsage.totalTokens = value.usage.total_tokens;
}
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6 changes: 6 additions & 0 deletions src/tests/stream-usage-accounting.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,9 @@ describe('OpenRouter Streaming Usage Accounting', () => {
completion_tokens_details: { reasoning_tokens: 8 },
total_tokens: 30,
cost: 0.0015,
cost_details: {
upstream_inference_cost: 19,
},
},
choices: [],
})}\n\n`,
Expand Down Expand Up @@ -125,6 +128,9 @@ describe('OpenRouter Streaming Usage Accounting', () => {
completionTokens: 20,
totalTokens: 30,
cost: 0.0015,
costDetails: {
upstreamInferenceCost: 19,
},
promptTokensDetails: { cachedTokens: 5 },
completionTokensDetails: { reasoningTokens: 8 },
});
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