About Jevx
Jevx is an independent browser playground and API front end for Jev, the decision model made by TypeSafe AI. You write a state — text or JSON — and name the questions you branch on; Jev answers each with a typed result and the probability behind every option. This page is the record of who runs Jevx, what it charges and how it handles your data; the allowance and prices below are generated from the site's live configuration rather than typed in.
Who operates Jevx
Jevx is operated as an individual sole proprietorship under the name Jevx. It is not affiliated with, endorsed by, or operated by TypeSafe AI; Jev and TypeSafe are the marks of their respective owner. Product, billing and privacy questions go to support@jevx.org, which is monitored by a human on business days.
How requests are billed
A request with up to 4 questions costs 10 credits — that is one decision in every plan. Each question beyond 4 adds 2 credits, up to 16 questions (34 credits) in one request, choice, score and noul in any mix. The price of a request shows on the Run button before it runs. A request that fails is refunded automatically; the one exception is a request blocked under the acceptable-use rules, where credits are not returned.
The free tier
- An account is required to run anything — there is no signed-out tier.
- 20 credits (2 typed decisions) are granted when you create an account. No card.
- +110 credits a week from daily check-ins, with the claim climbing across the cycle.
- That is up to 460 credits in a first month — about 46 typed decisions.
Plans and prices
Subscriptions grant decisions on a recurring basis; yearly plans grant the full year up front. Packs are one-time top-ups on the same balance. Checkout and the current offers are on the pricing page.
Monthly subscriptions
| Plan | Price | Decisions |
|---|---|---|
| Creator | $19.00 per month | 150,000 |
| Studio | $49.00 per month | 450,000 |
| Max | $98.00 per month | 1,200,000 |
Yearly subscriptions
| Plan | Price | Decisions |
|---|---|---|
| Creator | $114.00 per year | 1,800,000 |
| Studio | $294.00 per year | 5,400,000 |
| Max | $588.00 per year | 14,400,000 |
Decision packs (one-time)
| Plan | Price | Decisions |
|---|---|---|
| Decision Pack 1M | $69.00 one-time | 1,000,000 |
| Decision Pack 5M | $299.00 one-time | 5,000,000 |
A subscription can be cancelled at any time from Settings → Billing → Cancel subscription without contacting support; cancellation stops future charges immediately.
Refunds
A first paid subscription can be refunded in full within 7 days of the charge, provided less than 10% of that billing period’s credits have been used. Outside that window, duplicate charges, unauthorized charges and major technical faults on our side are considered case by case. Approved refunds go back to the original payment method through Stripe and typically appear within 5–10 business days. The complete terms are on the refund policy page.
Your data
The state, questions and criteria you submit are sent to OpenRouter, which routes them to TypeSafe AI to run the Jev model. Jevx does not train models on your content. Card details are entered on Stripe’s checkout and never reach Jevx’s servers. Retention periods and your deletion rights are set out in the privacy policy.
Frequently asked questions
What is Jevx?
Jevx is a browser playground and API front end for Jev, a decision model made by TypeSafe AI. You send a state and one or more typed questions; Jev returns a choice, a score or a true/false reading for each, with the probability behind every option.
Is Jevx the official Jev site?
No. Jevx is an independent tool built on the Jev API. It is not affiliated with, endorsed by, or operated by TypeSafe AI. Jev and TypeSafe are the marks of their respective owner.
Who operates Jevx?
Jevx is operated as an individual sole proprietorship under the name Jevx. Support is reachable at support@jevx.org and is monitored by a human on business days.
Do I need an account?
Yes. Running a decision requires an account, and a new account receives free credits with no card. Daily check-ins add more.
How does Jevx bill a request?
A request carrying up to four questions is one decision at a fixed number of credits; each question beyond four adds a small amount, and the price of a request shows on the Run button before it runs. A request that fails is refunded automatically; credits spent on a request blocked under the acceptable-use rules are not.
Can I cancel a subscription?
Yes, at any time from Settings → Billing → Cancel subscription, without contacting support. Cancellation stops future charges immediately; it does not by itself refund a charge already made.
Does Jevx offer refunds?
A first paid subscription can be refunded in full within 7 days of the charge if less than 10% of that period’s credits have been used. Outside that window, duplicate charges, unauthorized charges and major faults on our side are considered case by case. Refunds go back to the original payment method and typically appear within 5–10 business days.
Where does my data go?
The state, questions and criteria you submit are sent to OpenRouter, which routes them to TypeSafe AI to run the Jev model. Jevx does not train models on your content. Retention and deletion are set out in the privacy policy.