---
title: AI SDK metrics
description: Attach LLM usage metrics to request logs
---

Import from the `logixlysia/ai` subpath (no required peer dependency):

```ts
import logixlysia from 'logixlysia'
import { mergeAIMetrics } from 'logixlysia/ai'

const plugin = logixlysia()

const app = new Elysia()
  .use(plugin)
  .post('/chat', async ({ request, store }) => {
    // After your AI SDK call:
    mergeAIMetrics(store.logger, request, {
      model: 'claude-sonnet',
      provider: 'anthropic',
      inputTokens: 1200,
      outputTokens: 400,
      totalTokens: 1600,
      msToFinish: 2300
    })

    return { ok: true }
  })
```

The final access log `context.ai` object mirrors evlog’s wide-event `ai` field for easier migration.