Pricing
Jev Pricing
Check the current official rate and estimate your own workload with the free calculator.
Open Cost Calculator →Independent Jev AI hub
Learn Jev, try real apps, and build with it.
Explore TypeSafe AI's Jev System One model through a real applications, an interactive Playground, practical examples, pricing, and API guides for structured decisions.
Try a real Jev app
Should you build it?
Describe a startup or product idea. Jev scores eight bounded dimensions in one request, then JevHub calculates a transparent KILL, FIX, or SHIP result.
Second real Jev app
What needs your attention?
Sort six synthetic emails into Needs reply, Review, and Read later in one Jev request. Then try one message of your own without connecting an inbox.
What Jev is good at
Use Jev when the answer space is defined.
Jev returns typed decisions and probabilities for bounded tasks. It is not a replacement for open-ended text generation.
Classification
Choose one label from a defined set.
Routing
Choose the next queue, tool, or workflow branch.
Scoring
Evaluate input against an ordered rubric.
Verification
Estimate whether supplied evidence supports a yes/no condition.
Developer Playground
See the raw Jev decisions behind the apps.
Edit state, Choice, Score, and Noul questions yourself, then inspect typed results and probability distributions.
The basic shape
State + typed question → decision + probability
State“I was charged twice for my subscription.”
+
Typed questionWhich team should handle this?
→
DecisionBilling
Probability distributionEach allowed choice can carry a probability that your code can threshold or review.
Illustrative example flow — this is not a live Jev response.
Learn Jev
Understand the model, API, and cost.
Start with the concept, then move to the server-side API and current TypeSafe pricing.
Build with Jev
Start from a bounded pattern, not a blank prompt.
Copy practical Jev examples for support, sales, agents, and moderation, then adapt the criteria to your application.
choicenoul
Refund Detection
Identify whether a support case is primarily asking for money back, without turning classification into refund authorization.
choicenoulscore
Lead Qualification
Separate real sales opportunities from partnerships, support requests, spam, and unclear inbound messages.
choicenoul
Agent Router
Choose the next allowed agent or tool from a constrained graph without treating the model's choice as authorization.
noulchoice
Task Completion
Verify an agent's claim of completion against tool evidence and the observed final state.
Explore
See what people are building with Jev.
JevHub checks a small set of SDKs, playgrounds, integrations, agent tools, and open-source projects at their original sources.
Official
TypeSafe JavaScript SDK
Official TypeScript/JavaScript client for System One requests, including Choice, Score, and Noul builders with inferred answer types.
Last checked: 2026-09-21
Official
TypeSafe Python SDK
Official Python client for TypeSafe's System One API, useful when Jev decisions live in Python services or data pipelines.
Last checked: 2026-09-21
Official
System One Adapter (Python)
Official adapter that exposes a TypeSafeClient-compatible interface backed by chat-model providers for side-by-side workflow comparisons.
Last checked: 2026-09-21
Official
TypeSafe Agent Skills
Official agent skill material for using System One primitives and evaluation patterns from coding agents such as Codex and Claude Code.
Last checked: 2026-09-21
SDKs
advocaat
A compact community client that wraps TypeSafe/Jev decisions behind a type-oriented developer API.
Last checked: 2026-09-21
SDKs
typesafe-ai (Rust)
Community Rust client for TypeSafe AI with typed request/response handling for System One workloads.
Last checked: 2026-09-21
JevHub Store
Need a separate purchase path?
The Store remains a separate site. JevHub stays focused on apps, learning, examples, and the ecosystem.
Jev AI FAQ
Start with the question you actually have.
What is Jev AI?
Jev is TypeSafe AI's System One model for typed, probabilistic decisions. Read What is Jev?.
Can I try Jev without writing code?
Yes. Try the Startup Idea Validator to score an idea, Inbox Triage to sort sample emails, or the Playground to inspect raw decisions.
How do I use the Jev API?
Follow the Jev API quickstart and keep the TypeSafe API key on your server.
How much does Jev cost?
Check the Jev pricing page and use the cost calculator for your own traffic assumptions.