Providers

BundleLLM supports multiple AI providers. Users choose which provider to connect. Your integration code stays the same.

OpenRouter

OpenRouter is the recommended provider. Users click one button, authorize in a popup, and they’re connected. No API key copy-paste required. Gives access to models from every major provider through a single account.

Users can also use an API key from openrouter.ai/keys.

Available models in the SDK:

• Claude Sonnet 4 (anthropic/claude-sonnet-4)
• Claude Haiku 4.5 (anthropic/claude-haiku-4-5-20251001)
• GPT-4o (openai/gpt-4o)
• GPT-4.1 Mini (openai/gpt-4.1-mini)
• Gemini 2.5 Pro (google/gemini-2.5-pro-preview)
• Llama 4 Maverick (meta-llama/llama-4-maverick)

Anthropic

For users who want to use their Anthropic account directly. API key from console.anthropic.com.

Available models in the SDK:

• Claude Sonnet 4 (claude-sonnet-4-20250514)
• Claude Haiku 4.5 (claude-haiku-4-5-20251001)
• Claude Opus 4 (claude-opus-4-20250514)

Provider-Agnostic Code

Your integration doesn’t need to know which provider the user chose:

// This works the same regardless of provider
const stream = ai.chat({
  messages: [{ role: 'user', content: 'Hello' }],
})

stream.on('delta', (text) => {
  // Same event format from every provider
})

The SDK normalizes all provider differences. Streaming protocols, message formats, and auth mechanisms. Into a unified API.

Switching Models

Users can switch models anytime while connected:

// Widget: dropdown in header (automatic)
// Custom UI: use setModel()
ai.setModel('anthropic/claude-haiku-4-5-20251001')

// Get available models
const models = ai.getModels()
// [{ id: 'anthropic/claude-sonnet-4', name: 'Claude Sonnet 4' }, ...]