Settings

Default model — no account needed

Out of the box, GUARD currently uses Trinity Large Preview by Arcee AI — a free model that requires no sign-up or API key. It is a capable general-purpose AI suitable for all labs.

Why don't you just use ChatGPT?

Every time you send a prompt to an AI model like ChatGPT or Claude, the company behind it charges a small fee — often just a fraction of a cent. That sounds negligible, but with hundreds or thousands of users each running multiple lab iterations, those fractions add up to substantial costs very quickly.

PATHFINDER is an Erasmus+ funded educational project, and our budget simply cannot cover frontier AI models for every user. By bringing your own API key, you can unlock a wide variety of models while only paying for what you use — typically a few cents per lab session — while keeping the platform free and accessible for everyone.

How do I get started with a premium model?

GUARD connects to AI models through a service called OpenRouter — think of it as a single gateway that lets you access many different AI systems from one place. Here is what to do:

1. Create a free account at openrouter.ai.
2. Add a small amount of credit to your account (a few dollars is more than enough for many sessions).
3. Generate an API key in your OpenRouter dashboard.
4. Paste the key into the API Key field above and choose a model.

Your API key is stored only in your browser and is never sent to our servers. Usage fees are billed directly to your OpenRouter account — GUARD never handles your payment information.