OpenAI & Anthropic

Use your own API keys for official OpenAI and Anthropic models

Use your own API keys for cost control and billing transparency with official OpenAI and Anthropic models.

Configuration

Add to ~/.factory/settings.json:

{
  "customModels": [
    {
      "model": "claude-sonnet-4-5-20250929",
      "displayName": "Sonnet 4.5 [Custom]",
      "baseUrl": "https://api.anthropic.com",
      "apiKey": "YOUR_ANTHROPIC_KEY",
      "provider": "anthropic",
      "maxOutputTokens": 8192
    },
    {
      "model": "gpt-5-codex",
      "displayName": "GPT5-Codex [Custom]",
      "baseUrl": "https://api.openai.com/v1",
      "apiKey": "YOUR_OPENAI_KEY",
      "provider": "openai",
      "maxOutputTokens": 16384
    }
  ]
}

Getting API Keys

Anthropic

1. Sign up at console.anthropic.com
2. Navigate to API Keys section
3. Create a new API key
4. Copy and use in your configuration

OpenAI

1. Sign up at platform.openai.com
2. Go to API Keys section
3. Create a new secret key
4. Copy and use in your configuration

Notes

• These configurations use the official APIs with full prompt caching support
• Factory automatically handles prompt caching when available
• Use /cost command in CLI to view cost breakdowns and cache hit rates