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OfficialSites & GuidesVerified 2026-09-20

Models

The model card for jev-1.13.0: $42 per billion input tokens with free output, a 64k context, 250k tokens per second, and how to list the models your account can call.

Open docs.typesafe.ai
Category
Sites & Guides
Published by
TypeSafe AI
Author
—
Added
2026-09-20
Tagsofficialdocsmodelsapipricing

Highlights

  • jev-latest and jev-preview both point at jev-1.13.0; there is no separate preview build.
  • Output tokens are free; only input is billed, at $42 per billion tokens.
  • 64k context covers 32k of state plus the longest question.
  • Rate limits adjust dynamically and can change without notice.

Quickstart

python
from typesafe_sdk import TypeSafeClient

with TypeSafeClient() as client:
    for model in client.models.list().models:
        print(model.name, model.release_date, model.description)

Watch out

English is the primary language and non-English accuracy is lower, so test before relying on it for other languages.

More like this

API Reference
The raw HTTP contract behind every SDK: POST a state plus typed noul, choice, and score questions to /v1/systemone, and get one answer per question, with error codes and retry guidance.
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System One
The idea behind Jev: models that return typed decisions and probabilities instead of generated text, named after Kahneman's fast-thinking System 1, with confidence to route around uncertainty.
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AI Primer: RLCD and Calibration
Why TypeSafe trains decision models with RLCD instead of RLHF: calibrated probabilities where 0.2 outcomes happen about 20% of the time, and the case for machine-to-machine automation.
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Back to all resources

From the community

Posts from builders shipping with Jev right now.

LLM-as-a-judge, sped up

Yuchen Jin
Yuchen Jin
Databricks
@Yuchenj_UW
·

Jev has spoken. It picked which model is AGI. 20–200x faster. 40–400x cheaper. This could make things like LLM-as-a-judge insanely fast and nearly free. (I tried a bunch of prompts and still didn’t burn through $0.10.)

Image
Diogo Almeida
Diogo Almeida
TypeSafe AI
@CompleteSkeptic

After co-inventing ChatGPT, I kept asking myself: why have superhuman chat models not led to AGI? I’ve spent the last 2 years in stealth building a new way to train models (RLCD), and a new type of frontier AI model that we are releasing today: Jev • 20-200x faster • 40-400x

Watch on X
Reply
Read 94 replies

Instant compaction with Jev