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Supported Providers

GenX uses large language models to generate tweet replies. You bring your own API key — GenX never stores keys beyond making API calls on your behalf.

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OpenRouter

Best for: Maximum flexibility OpenRouter gives you access to 200+ AI models through a single API key. You can switch between Claude, GPT-4, Llama, Gemini, and more without changing keys.
  • Get your key at openrouter.ai/keys
  • Recommended model: Claude Sonnet 4
  • Pay per use — no monthly minimum

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OpenAI

Best for: Reliability OpenAI’s GPT models are the most widely used and battle-tested.

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Anthropic

Best for: Tone matching and nuance Claude models from Anthropic are excellent at understanding tone, context, and producing natural-sounding replies.
  • Get your key at console.anthropic.com
  • Recommended model: Claude Haiku (fast) or Claude Sonnet (quality)

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Groq

Best for: Speed and free usage Groq’s hardware delivers the fastest inference in the industry. Replies generate in under 1 second.
  • Get your key at console.groq.com
  • Recommended model: Llama 3.3 70B
  • Free tier available — great for testing

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Google

Best for: Cost-effective with free tier Google’s Gemini models offer excellent quality at competitive prices.

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Testing Your Key

After entering your API key:
  1. Click Test Key
  2. GenX makes a minimal API call to verify it works
  3. You’ll see Verified (green) or an error message
If your key test fails, double-check that you’ve copied the full key and that your account has available credits/quota.

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Switching Providers

You can switch providers at any time in Settings. Your API keys for all providers are saved — just click a different provider card to switch. The active provider is highlighted with a gold border.