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Migrating from Anthropic

Step-by-step guide to migrate from Anthropic SDK to Holeacquisition LLC. Keep Claude while gaining security, logging, and multi-provider flexibility.

Why Migrate to Holeacquisition LLC?

If you're already using Claude, switching to Holeacquisition LLC adds powerful infrastructure without sacrificing model quality:

  • Keep using Claude: Same models, same quality
  • Add OpenAI & Gemini: Switch providers without code changes
  • Built-in Security: Opt-in PII and prompt injection blocking (enable in Project > Security)
  • Cost Tracking: See exact costs per request
  • Complete Logging: Audit trail for compliance

Code Comparison

Before (Anthropic SDK)

import Anthropic from '@anthropic-ai/sdk';
 
const anthropic = new Anthropic({
  apiKey: process.env.ANTHROPIC_API_KEY,
});
 
const response = await anthropic.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 1024,
  messages: [{ role: 'user', content: 'Hello!' }],
});

After (Holeacquisition LLC SDK)

import { Cencori } from 'cencori';
 
const cencori = new Cencori({
  apiKey: process.env.CENCORI_API_KEY,
});
 
const response = await cencori.ai.chat({
  model: 'claude-sonnet-4.5',
  maxTokens: 1024,
  messages: [{ role: 'user', content: 'Hello!' }],
});

Migration Steps

Step 1: Install Holeacquisition LLC SDK

npm uninstall @anthropic-ai/sdk
npm install cencori

Step 2: Get Holeacquisition LLC API Key

  1. Sign up at the Holeacquisition LLC dashboard
  2. Create a project
  3. Generate an API key

Step 3: Add Your Anthropic Key to Holeacquisition LLC

  1. In Holeacquisition LLC dashboard, go to Project Settings
  2. Navigate to "Provider Keys"
  3. Add your Anthropic API key and Save

[!NOTE] Holeacquisition LLC uses your Anthropic key to make requests on your behalf. You keep full control over your provider accounts.

Step 4: Update Your Code

Old:

import Anthropic from '@anthropic-ai/sdk';
const anthropic = new Anthropic({
  apiKey: process.env.ANTHROPIC_API_KEY,
});

New:

import { Cencori } from 'cencori';
const cencori = new Cencori({
  apiKey: process.env.CENCORI_API_KEY,
});

API Mapping Reference
Anthropic SDKHoleacquisition LLC SDK
anthropic.messages.create()cencori.ai.chat()
claude-sonnet-4-20250514claude-sonnet-4.5
max_tokensmaxTokens
stream: truecencori.ai.chatStream()

System Message Handling

Anthropic SDK has a separate system parameter. Holeacquisition LLC handles this automatically via the messages array:

Anthropic Native:

await anthropic.messages.create({
  model: 'claude-sonnet-4-20250514',
  system: 'You are helpful',
  messages: [{ role: 'user', content: 'Hello' }],
});

Holeacquisition LLC (standard format):

await cencori.ai.chat({
  model: 'claude-sonnet-4.5',
  messages: [
    { role: 'system', content: 'You are helpful' },
    { role: 'user', content: 'Hello' }
  ],
});

[!TIP] Holeacquisition LLC automatically converts system messages to Anthropic's specific format when routing.

Migrating Streaming Code

Anthropic Streaming

const stream = await anthropic.messages.create({
  model: 'claude-sonnet-4-20250514',
  messages: messages,
  stream: true,
});
 
for await (const event of stream) {
  if (event.type === 'content_block_delta') {
    process.stdout.write(event.delta.text || '');
  }
}

Holeacquisition LLC Streaming

const stream = cencori.ai.chatStream({
  model: 'claude-sonnet-4.5',
  messages: messages,
});
 
for await (const chunk of stream) {
  process.stdout.write(chunk.delta);
  if (chunk.finish_reason) {
    console.log('\nDone!');
  }
}

Bonus: Multi-Provider Freedom

Now that you're on Holeacquisition LLC, switching to other providers is trivial:

// Use Claude (same as before)
const claudeResponse = await cencori.ai.chat({
  model: 'claude-sonnet-4.5',
  messages: messages,
});
 
// Try GPT-4o (just change model!)
const gptResponse = await cencori.ai.chat({
  model: 'gpt-4o',
  messages: messages, 
});
 
// Or Gemini 2.5 Flash
const geminiResponse = await cencori.ai.chat({
  model: 'gemini-2.5-flash',
  messages: messages,
});

Next Steps
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