AI for business
Describe the work.
We put the right AIs on it.
Ask which AI model suits a job, or hand over the job itself. Model Stack has several leading models draft it independently, critique each other, and deliver one checked result — instead of gambling on whichever single model your team happens to already use.
- Pay only for tasks you run
- One invoice, not four AI vendor bills
- Card details secured by Stripe
- No subscription or seat fees
Try a real request
How it works
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1
Describe the task
Type what you need in plain language, the way you'd brief a person — a request, a length, a tone, anything specific it must cover.
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2
Models draft, review and check
Several AI models draft it independently, others compare the drafts, one writes the final version, and a different one checks it against your request. Watch it happen live — exactly which model did what.
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3
Pay only for what ran
See an estimated price while it works and the exact price when it's done — the real AI cost of that task, plus one flat fee. No subscription either way.
Transparency
Every task shows its receipts. Open "See the models at work" on any task and you'll see exactly which model did what, how much of the answer each one wrote, and real measured speed and reliability — not a marketing benchmark, the actual numbers from your own usage.
Pricing
No subscription, no seat fees, no charge for asking which model to use. You're billed only when a task actually runs, at its measured AI cost plus one flat, disclosed fee — never a hidden markup.
Questions
Do I need a card to sign up?
No. Creating an account is free. You'll add a payment method only when you're ready to run your first task, and nothing is charged when you add it.
Is my payment information safe?
Your card details never touch our servers. They're entered directly on Stripe's own secure page, and we only ever keep the card's brand and last four digits.
How exactly is a task priced?
Every task is billed at its measured AI cost — what the underlying models actually used, token by token — plus one flat service fee, shown before and after every task.
What if a task fails partway through?
You're billed only for the model calls that actually ran. A failed or cancelled task never charges you for work that wasn't produced.
Who can see our API keys?
Nobody outside your organization. Your administrator adds provider keys once, on a separate admin page — they're never sent to a browser or shown to anyone running a task.
Is there a contract or minimum spend?
No. There's no subscription, seat minimum or lock-in contract. You pay only for the tasks you actually run, and you can stop anytime by simply not running more.
Can we control which AI models are used?
Yes. Your administrator chooses which models are available and can switch any of them off — nothing runs that you haven't approved.
Where does our data go?
Each task is sent to whichever AI provider is behind that model (for example Anthropic or OpenAI), using your organization's own API keys. Model Stack itself stores only the account, billing and task records needed to run and bill your usage — never your API keys or card details.