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Get an API key

Kapus runs on your own key. Pick a provider and follow the steps — most take under 3 minutes.

✨ Walk me through it →

OpenAI

~3 min · 5 steps

The default choice — GPT-4o / 4o-mini / o4-mini. Works directly from the browser.

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OpenRouter

~2 min · 5 steps

One key → hundreds of models (OpenAI, Claude, Gemini, Llama…). Easiest way to try many models.

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Anthropic

~3 min · 5 steps

Claude models (Sonnet, Haiku) straight from the maker. Great for writing and reasoning.

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Groq

~1 min · 4 steps

Open models (Llama 3.x) at very high speed, with a generous free tier. Good free starting point.

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Google Gemini

~2 min · 4 steps

Google's Gemini models, with a free tier via AI Studio.

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Kapus Local (Ollama)

~5 min · 4 steps

Run a model on YOUR machine — no key, no cost, nothing leaves your device. Smaller/slower than frontier APIs.

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