Anthropic Integration

npm install costlens @anthropic-ai/sdk

import { CostLens } from 'costlens';
import Anthropic from '@anthropic-ai/sdk';

const anthropic = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });
const costlens = new CostLens({ 
  apiKey: process.env.COSTLENS_API_KEY,
  smartRouting: true
});

const tracked = costlens.wrapAnthropic(anthropic);

const result = await tracked.messages.create({
  model: 'claude-sonnet-4.6',
  max_tokens: 1024,
  messages: [{ role: 'user', content: 'Summarize this document' }]
});

await costlens.trackAnthropic(
  params,
  result,
  Date.now() - start,
  'content-generation-v1'  // promptId
);

const costlens = new CostLens({ 
  apiKey: process.env.COSTLENS_API_KEY,
  enableCache: true
});

const tracked = costlens.wrapAnthropic(anthropic);

const result = await tracked.messages.create(
  { model: 'claude-sonnet-4.6', max_tokens: 1024, messages: [...] },
  { cacheTTL: 3600000 }
);

const start = Date.now();
try {
  const result = await anthropic.messages.create(params);
  await costlens.trackAnthropic(params, result, Date.now() - start);
  return result;
} catch (error) {
  await costlens.trackError(
    'anthropic', params.model,
    JSON.stringify(params.messages),
    error, Date.now() - start
  );
  throw error;
}