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@ai-billing/deepseek
@ai-billing/deepseek / createDeepSeekV3Middleware

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Function: createDeepSeekV3Middleware()

createDeepSeekV3Middleware<TTags>(options): LanguageModelV3Middleware
Defined in: deepseek/src/ai-sdk/language-model-middleware/v3/language-model-v3-deepseek-billing-middleware.ts:95 Creates a V3 billing middleware for the DeepSeek provider (@ai-sdk/deepseek). Derives token usage from DeepSeek’s raw usage payload and resolves cost from pricing plus usage. DeepSeek uses prompt_cache_hit_tokens / prompt_cache_miss_tokens for cache accounting, and completion_tokens_details.reasoning_tokens for deepseek-reasoner models.

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Type Parameters

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TTags

TTags extends JSONObject The shape of the tags object, extending DefaultTags.

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Parameters

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options

DeepSeekV3MiddlewareOptions<TTags> Billing options; see DeepSeekV3MiddlewareOptions. A priceResolver is required.

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Returns

LanguageModelV3Middleware A V3 billing middleware instance for DeepSeek.

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Example

import { createDeepSeek } from '@ai-sdk/deepseek';
import { wrapLanguageModel } from 'ai';
import { createDeepSeekMiddleware } from '@ai-billing/deepseek';
import {
  consoleDestination,
  createObjectPriceResolver,
  type ModelPricing,
} from '@ai-billing/core';

const deepseek = createDeepSeek({ apiKey: process.env.DEEPSEEK_API_KEY });

const customPricingMap: Record<string, ModelPricing> = {
  'deepseek-chat': {
    promptTokens: 0.27 / 1_000_000,
    completionTokens: 1.10 / 1_000_000,
    inputCacheReadTokens: 0.07 / 1_000_000,
    inputCacheWriteTokens: 0,
  },
  'deepseek-reasoner': {
    promptTokens: 0.55 / 1_000_000,
    completionTokens: 2.19 / 1_000_000,
    inputCacheReadTokens: 0.14 / 1_000_000,
    inputCacheWriteTokens: 0,
    internalReasoningTokens: 2.19 / 1_000_000,
  },
};

const priceResolver = createObjectPriceResolver(customPricingMap);

const billingMiddleware = createDeepSeekMiddleware({
  destinations: [consoleDestination()],
  priceResolver,
});

const wrappedModel = wrapLanguageModel({
  model: deepseek('deepseek-chat'),
  middleware: billingMiddleware,
});