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You don’t need an API key to start using Viorant. Every signed-in account gets a credit wallet and access to the Viorant managed provider, so you can write a prompt, run an agent, and see real output on your first session.
Credits are the zero-setup path. Bringing your own key is still fully supported and has no credit cost — use it when you want your own account, your own rate limits, or a model Viorant doesn’t manage.

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Your wallet

New accounts are granted 2,500 credits, once. There’s no card, no subscription, and no monthly reset. The wallet is a single balance. Everything you do that calls a managed model draws from the same pool — there’s no separate allowance per feature.

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What spends credits

Three things in the Hub spend credits, and only when you use the Viorant provider:

The Assistant

Every turn you take with the Assistant, including the ones that plan rather than build.

The AI prompt builder

Generating a prompt, and improving an existing one.

Test runs

Running a prompt, skill, or agent against a Viorant tier from a test panel.
Anything running on your own provider key costs no credits — that traffic goes from your machine straight to the vendor and never touches Viorant’s metering.

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Tiers

The Viorant provider offers two tiers. They differ in capability and in what they cost you per call: Pick a tier wherever you choose a Viorant model — when you add one to a Space’s model pool, in the prompt builder when you generate, or in the Assistant. A single prompt generation typically costs a credit or two on Low and under ten on Medium, so the starting grant covers a lot of ordinary iteration.
Cost scales with how much text goes in and comes out, not just the tier. A long document in the context window costs more than a one-line question at the same tier.

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Watching your balance

Your balance is visible in the Hub next to your profile, and the prompt builder shows what a generation will draw before you run it. For the detail, open the profile menu and choose Usage. You’ll get your current balance plus a day-by-day history — each date shows the balance you ended that day on, and expands to the individual entries behind it, so you can see exactly what a particular session cost.

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Buying more credits

You can top up at any time at sentinel.viorant.io — sign in with the same account you use in the Hub, open Billing, and pick a pack. The Hub’s credit surfaces link straight there. Purchased credits never expire, and they add to whatever you already have rather than replacing it. There’s no subscription and no monthly reset.
The $10 pack is exactly 10,000 credits — the published rate, with no bonus. The larger packs include progressively more credits per dollar, which is why their totals aren’t round multiples.
Past purchases are listed under Billing, alongside your day-by-day usage.

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When you run out

At zero, calls to the Viorant provider stop rather than silently failing or billing you. The Hub tells you the balance is exhausted, and you can either top up or add your own key. Adding a key restores full functionality immediately — your own models have no credit cost and no cap beyond whatever your provider account allows.

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Where your data goes

Managed-model calls are metered server-side, which means the request passes through Viorant’s control plane to reach the model. That’s what makes zero-key usage possible. If you would rather no prompt content passed through Viorant at all, use your own key — that path calls the provider directly from your machine, and Viorant is not in the request path.

Bring your own key

Use your own provider account instead — no credit cost, no metering.