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Average Ratings 0 Ratings

Total
ease
features
design
support

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Write a Review

Description

Create Stripe-like SDKs and documentation tailored for your API with ease. Provide type-safe SDKs in widely used programming languages, allowing Fern to handle the complex task of generating and distributing client libraries, enabling your team to concentrate on API development. Simply import your API definition, whether in OpenAPI format or Fern’s more straightforward alternative. Choose from a variety of code generators, including TypeScript, Python, Java, Go, Ruby, C#, and Swift, to suit your needs. Fern takes care of semantic versioning and publishes packages to various registries like npm, pypi, and maven, ensuring seamless integration. Plus, enjoy visually appealing API documentation that aligns with your brand identity for a cohesive user experience. This way, you can enhance both the functionality and presentation of your API offerings.

Description

Jev is TypeSafe AI’s first public System One Model, a class of AI designed to make fast, structured decisions that software can consume directly. Instead of generating arbitrary strings like a traditional large language model, Jev produces predefined type-safe values accompanied by calibrated probabilities and confidence estimates. Its architecture generates outputs in parallel rather than autoregressively producing one token at a time, allowing the model to prioritize speed and computational efficiency. TypeSafe trains Jev using Reinforcement Learning for Calibrated Decisions, an approach intended to optimize for accurate uncertainty estimates and consistent structured outputs. The model can be embedded into conventional software as an intelligent decision layer for classification, scoring, routing, extraction, branching, and other tasks where hand-written rules would be too rigid. Jev can also be used to judge, verify, guardrail, or detect problematic behavior in outputs from other AI systems. TypeSafe reports typical end-to-end response times between 70 and 500 milliseconds and positions the model for applications where low latency is important. The company also emphasizes schema guarantees, meaning Jev’s outputs are constrained to the structures defined by the application rather than requiring developers to parse and validate unrestricted generated text. Jev is aimed at developers and organizations building automation, real-time software, large-scale data workflows, and production systems that require dependable structured AI decisions.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Sayari Yes 

Integrations

Sayari No 

Pricing Details

$250 per month
Free Trial No 
Free Version No 

Pricing Details

Input: $0.042 / 1M tokens
Input tokens: $0.042 / 1 million tokens ($42 per billion tokens).

Output tokens: FREE (too cheap to meter).
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Fern

Founded

2022

Country

United States

Website

buildwithfern.com

Vendor Details

Company Name

TypeSafe AI

Founded

2024

Country

United States

Website

typesafe.ai/

Product Features

API Management

API Design No 
API Lifecycle Management No 
Access Control No 
Analytics No 
Dashboard No 
Developer Portal No 
Testing Management No 
Threat Protection No 
Traffic Control No 
Version Control No 

Software Documentation

Access Roles / User Permissions No 
Automatic Documentation Generation No 
Collaboration Tools No 
Docs Web Hosting No 
Feedback Capture No 
Markdown Support No 
Multiple Formats Support No 
Multiple Versions Support No 
Version Control No 
WYSIWIG Editor No 
Webhooks No 
reStructured Text Support No 

Product Features

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