Pricing
Our pricing philosophy
We believe your AI costs should be transparent and predictable. Vellum passes through model provider costs at cost — we don't charge any margin or markup on token usage. When you spend $1 worth of credits on LLM tokens, that full dollar goes to the model provider. Our goal is to keep Vellum affordable and aligned with your actual usage, not to profit from the AI calls your assistant makes.
How pricing works
Vellum uses a prepaid credit balance: usage is deducted from your credits as you use the assistant. You can add credits anytime from the Billing page via Stripe Checkout. Applicable taxes may be added during checkout.
In the app, your Billing screen shows a Credit Balance plus a breakdown of settled and pending amounts:
- Credit Balance: the current amount available after pending compute is considered.
- Settled Balance: charges that have already settled.
- Pending Usage: estimated in-flight compute that may not be fully settled yet.
How to add credits
You can add credits from the app's Billing settings:
- Open Settings and go to the Billing tab.
- Enter a credit amount.
- Select Add credits to start checkout.
- Complete checkout in your browser.
- Return to the app and refresh/reopen Billing to see the updated balance.
A minimum top-up amount can apply, and the app will show that minimum before checkout if your entered amount is too low.
What happens when credits run out
When credits are exhausted, the app will show a “You've run out of credits” message with an Add Credits action that links you to Billing. Assistant actions that require paid usage will pause until credits are added.
Need help with billing?
Contact support at support@vellum.ai.