Jev

Jev is TypeSafe AI's System One decision model: it evaluates a state against typed yes/no, choice, and score questions and returns calibrated probabilities and confidence instead of generated text.

start building →

compare models

                         .:::....
                       .:+=@@=*:..
                   ...-*%@@@#@@@=+-:..
                 ..:+=@@=*=@%+*%@@@%*-:..
                :-*%@@*-::*@=:.::+=@@@=*:.
            ..:+=@@=+:.. .*%%:.  .::+=@%=:
          ..-*%@%*-:.   .:+@%:.     .:*%=:.
        .:-=@@=*:..      .*@=:       :+%=:
     .:-*%@%*-:.         :+%=:.      .+%%:
   .:+=@@=*-..          .:*@%-:..    .+%=:.
  :+%@%*-...          .:-=%@@%=+:.....+%=:.
 .+@%*:..           .:*%@%*+*=@@%=+:.:+%=:.
 :*@=-.          .:-*%%=*:....:+=%@%=**%=:
.:*@%:.        .:*=@%*-..     ..::+=%@@%%-:..
..*@%-.      .:*%@%*-..          .:-=@@@@@=*-:...
 .+%%:.     .:+@@@%*+:..       .:-*%%%=%%=%%%=*-..
 :*@=:       .+@@=%@%%*-:.. ..:+=%%=--*%=::-*=%%=+-..
 .+@=:.     ..*@=---*=@%=*+:-*%%=+:..:+%=:. ..-+=%%=:..
.:+@=-      ..+%=:...:-*=%%%@%*-:.   .+%*:   . .:-*=*..
..+@%:       :+%=:.    .:-=%=-:.     .+=*.      ..-=*..
 .*@=:.      :+@=:       :+%=:      ..+%*:       .-=*:.
 :+%=:.      .+%=:.      .+%=:       .+==:.      .-=*:
.:*%=:.     .:+%=:.      .+%*:.      .+%*:       .-=*:.
 .+%=:     .:-=@%=+:. .  .+%=:       .+%*:.     ..-=*..
 .+%=:. ..:+=%%==%%%*+:...+=*:       .+=*:.      .-=*..
 .*@=:.:-*%%=+:.:-+=%%=*+-+%=..      .+=*..      .-=*:.
 .+%=++=%%*-..   ..::+=%%%=%*:.      .+=*:      ..-=*..
 .+%%%%=+:..         .:-*%%=+..      .-=*:       .-=*.
 .+%@@=-:...         .:+=%=+..       .+=*..      .-=+:.
 .:+*%%%=+::.     .:+*%%*-:..       ..-=*..     ..-**.
   ..:+*%%%=+-:.::*==*+:.            :-=*:.      .-*+.
      ..:-*=%%=**==*-...          ..:+===*+:..   .:=+..
          .:-*=%%+:..          ...-+*=++****+-:...:*+:.
            .:+=*:            .:+*=*-....:-+**=+---*+:
             .+%*.         ..-+==+:.       ..-+*===*+..
             .-%*:      ..:+==*+..           ..:-***-.
             .-=*:   ...:+==+-:..          . .:+**+:.
            ..+=*:. .:+*=*-...            .:-+*+-..
            ..+=*:::***+:...           ..:-**+-.
             .-=**==*-...           ..:-+*+-:.
             .-===*-:..           ..:+**+:..
             .:*===+-.. .      ..:-**+-..
             . .:+*==*+:.. . ..:+**+-...
                 ..:-**=*+-.:-+**-...
                     .:-+*****+:.
                       ...--::...
                           ..

input · usd / 1m tok

$0.042

output · usd / 1m tok

$0.00

context window

32ktokens

modalities · in → out

pricing

base api ratesusd per 1m tokens

input: $0.042
output: $0.00

providers

TypeSafe AI hosts Jev. Impossibl routes your request intelligently and handles failover automatically when a provider is down.

TypeSafe AI

specifications

takes text in, gives typed answers outtypesafe-ai/jev

creatorTypeSafe AI
model typeEvaluation
context window32,000 tokens
maximum outputnot published
input
takes text in, gives typed answers out
outputtyped answers with probabilities
tool callingnot supported
releasedsep 15, 2026
endpoint/v1/systemone

unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.

benchmarks

benchmark results are not available for this model yet.

frequently asked questions

What is Jev?

Jev is TypeSafe AI's System One decision model: it evaluates a state against typed yes/no, choice, and score questions and returns calibrated probabilities and confidence instead of generated text. It is built for routing, classification, guardrails, and scoring steps that need a fast, structured judgment your code can act on directly.

How much does Jev cost?

Jev costs $0.042 per million input tokens and $0.00 per million output tokens through the Impossibl API. All rates are in USD.

view the pricing table ↑

What is the context length of Jev?

Jev has a 32,000-token context window through the Impossibl API.

Does Jev support tool calling?

No. Jev does not support tool calling through the Impossibl API.

What inputs and outputs does Jev support?

Jev accepts text as input. Jev returns typed answers with probabilities.

How do I use Jev through an API?

Jev is available through the Impossibl API. Use typesafe-ai/jev as the model identifier with /v1/systemone. The quickstart explains how to create an API key and send your first request.

follow the api quickstart →

When was Jev released?

TypeSafe AI released Jev on September 15, 2026.

Creator release announcement ↗

this page describes Jev as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes. model descriptions and release dates, where available, use the creator sources linked under the answers above.

view the source catalog ↗model as markdown ↗report a correction →