Jev
Jev by TypeSafe AI is a model API that takes state plus typed questions and returns Choice, Score and true/false answers with calibrated probabilities instead of generated text.
About Jev
What is Jev?
Jev is TypeSafe AI's first System One model: an API that takes unstructured state plus typed questions and returns typed decisions with calibrated probabilities, rather than text your code has to parse.
Three primitives
- Choice picks one option from a list and returns per-option probabilities and a confidence value.
- Score rates the state against a rubric and returns a score distribution.
- Noul answers whether a statement is true, as a value between 0 and 1.
All three can be mixed in one call and are evaluated in parallel.
Where it fits
Intent routing, confidence-gated routing to an LLM, classification, re-ranking, RAG passage filtering, citation checks, LLM guardrails and function-call selection.
Pricing
Usage-based: $42 per billion input tokens, output tokens free. Python and JavaScript SDKs plus an HTTP API.
About TypeSafe AI
Founded in 2024 and based in San Francisco, TypeSafe AI emerged from stealth in September 2026 with a $40M seed round led by DCVC.
Value & Audience
Value Proposition
Replaces slow, expensive LLM calls for yes/no, pick-one and scoring decisions with a single typed API call that returns calibrated probabilities in milliseconds, with no output parsing.
Problem Solved
Automations that use an LLM for small decisions pay for generated text, wait seconds per call and then have to parse and trust free-form output. Jev returns typed answers with confidence values so software can act on them or route low-confidence cases elsewhere.
Tech Stack
Frontend
Social & Links
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Feedback & Roadmap
Jev FAQ
Common questions about Jev's features, pricing, and use cases
Is Jev free to use?
No. Jev is a paid product, starting at Usage-based - $42 per billion input tokens ($0.042 per million); output tokens free. Plans listed: Usage-based - $42 per billion input tokens ($0.042 per million); output tokens free; Enterprise - contact sales.
What are some alternatives to Jev?
Popular AI Tools & Platforms alternatives to Jev include Ricebowl AI, ToSong and Quick I Ching.
Jev appears in
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