# TypeSafe AI

> Decision models that return typed answers with calibrated confidence in about 100ms.

Canonical: https://www.subconscious.dev/providers/typesafe-ai · By The Subconscious Team · Updated September 30, 2026

- Founded: 2024
- Example models: Jev, jev-1.13
- Website: https://typesafe.ai

## Overview

TypeSafe AI builds decision models instead of text generators. Founder Diogo Almeida co-invented RLHF and InstructGPT at OpenAI and later worked at Google Brain. After two years in stealth the company released its first System One Model, Jev, in early access. The name nods to Kahneman's fast System 1 thinking, and the model is built for machines to call, not people to chat with.

Jev gives up free-form strings. A developer defines the answer space up front with primitives like Choice, Score and a true-or-false type, and Jev returns a typed answer plus calibrated probabilities and a confidence score. It evaluates every option in parallel in one pass rather than token by token, so most calls finish in about 100ms and cost a tiny fraction of an LLM call. A new training method, Reinforcement Learning for Calibrated Decisions, targets probabilities that track real accuracy. Because outputs always match the schema, Jev cannot produce a type error or hallucinate a value outside the options.

## Upsides

- Roughly 40 to 200x faster than an LLM on decision-shaped queries, at a fraction of the cost.
- Calibrated confidence lets software act automatically when sure and escalate when not.

## Core use cases

- Smart if-statements inside workflows, like routing tickets, scoring leads or classifying intent.
- Guardrails and routers inside agent harnesses, such as detecting jailbreaks, grading tool calls or picking which LLM gets a prompt.

## Downsides

- No text or code generation, so it complements an LLM rather than replacing one.
- Early access, text-only input, and a new programming model teams have to learn.

## At a glance

| Attribute | Value |
|---|---|
| Model access | Decision models |
| Flagship models | Jev, jev-1.13 |
| Speed | ~100ms per call |
| Price | A fraction of an LLM call |
| Customization | - |
| Deployment | Early-access API |
| Long context | - |

## FAQ

### What is TypeSafe AI?

TypeSafe AI builds decision models instead of text generators. Founder Diogo Almeida co-invented RLHF and InstructGPT at OpenAI and later worked at Google Brain. After two years in stealth the company released its first System One Model, Jev, in early access. The name nods to Kahneman's fast System 1 thinking, and the model is built for machines to call, not people to chat with.

### What is TypeSafe AI best for?

Smart if-statements inside workflows, like routing tickets, scoring leads or classifying intent; Guardrails and routers inside agent harnesses, such as detecting jailbreaks, grading tool calls or picking which LLM gets a prompt.

### How much does TypeSafe AI cost?

TypeSafe AI pricing at a glance: A fraction of an LLM call. Rates change often, so check TypeSafe AI's pricing page before committing.

### What are the downsides of TypeSafe AI?

No text or code generation, so it complements an LLM rather than replacing one; Early access, text-only input, and a new programming model teams have to learn.

### What are the best alternatives to TypeSafe AI?

Common alternatives include Subconscious, OpenAI, Anthropic, Google Vertex AI, Amazon Bedrock. Each has a head-to-head comparison with TypeSafe AI on this site.

## Comparisons

- [Subconscious vs TypeSafe AI](https://www.subconscious.dev/compare/subconscious-vs-typesafe-ai.md)
- [OpenAI vs TypeSafe AI](https://www.subconscious.dev/compare/openai-vs-typesafe-ai.md)
- [Anthropic vs TypeSafe AI](https://www.subconscious.dev/compare/anthropic-vs-typesafe-ai.md)
- [Google Vertex AI vs TypeSafe AI](https://www.subconscious.dev/compare/google-vertex-vs-typesafe-ai.md)
- [Amazon Bedrock vs TypeSafe AI](https://www.subconscious.dev/compare/aws-bedrock-vs-typesafe-ai.md)
- [Together AI vs TypeSafe AI](https://www.subconscious.dev/compare/together-ai-vs-typesafe-ai.md)
- [Fireworks AI vs TypeSafe AI](https://www.subconscious.dev/compare/fireworks-vs-typesafe-ai.md)
- [Baseten vs TypeSafe AI](https://www.subconscious.dev/compare/baseten-vs-typesafe-ai.md)
- [Groq vs TypeSafe AI](https://www.subconscious.dev/compare/groq-vs-typesafe-ai.md)
- [Cerebras vs TypeSafe AI](https://www.subconscious.dev/compare/cerebras-vs-typesafe-ai.md)
- [DeepInfra vs TypeSafe AI](https://www.subconscious.dev/compare/deepinfra-vs-typesafe-ai.md)
- [Modal vs TypeSafe AI](https://www.subconscious.dev/compare/modal-vs-typesafe-ai.md)
- [xAI vs TypeSafe AI](https://www.subconscious.dev/compare/xai-vs-typesafe-ai.md)
- [DeepSeek vs TypeSafe AI](https://www.subconscious.dev/compare/deepseek-vs-typesafe-ai.md)
- [Moonshot AI vs TypeSafe AI](https://www.subconscious.dev/compare/moonshot-ai-vs-typesafe-ai.md)
- [Z.ai vs TypeSafe AI](https://www.subconscious.dev/compare/z-ai-vs-typesafe-ai.md)
- [Alibaba Cloud vs TypeSafe AI](https://www.subconscious.dev/compare/alibaba-cloud-vs-typesafe-ai.md)
- [Meta vs TypeSafe AI](https://www.subconscious.dev/compare/meta-vs-typesafe-ai.md)
- [SambaNova vs TypeSafe AI](https://www.subconscious.dev/compare/sambanova-vs-typesafe-ai.md)
- [Nebius vs TypeSafe AI](https://www.subconscious.dev/compare/nebius-vs-typesafe-ai.md)
- [fal vs TypeSafe AI](https://www.subconscious.dev/compare/fal-vs-typesafe-ai.md)
- [Novita AI vs TypeSafe AI](https://www.subconscious.dev/compare/novita-ai-vs-typesafe-ai.md)
- [Parasail vs TypeSafe AI](https://www.subconscious.dev/compare/parasail-vs-typesafe-ai.md)
- [Inference.net vs TypeSafe AI](https://www.subconscious.dev/compare/inference-net-vs-typesafe-ai.md)
- [GMI Cloud vs TypeSafe AI](https://www.subconscious.dev/compare/gmi-cloud-vs-typesafe-ai.md)
- [Sail Research vs TypeSafe AI](https://www.subconscious.dev/compare/sail-research-vs-typesafe-ai.md)
- [Morph vs TypeSafe AI](https://www.subconscious.dev/compare/morph-vs-typesafe-ai.md)
- [Relace vs TypeSafe AI](https://www.subconscious.dev/compare/relace-vs-typesafe-ai.md)
- [TypeSafe AI vs StepFun](https://www.subconscious.dev/compare/typesafe-ai-vs-stepfun.md)
- [TypeSafe AI vs Runware](https://www.subconscious.dev/compare/typesafe-ai-vs-runware.md)
- [TypeSafe AI vs StreamLake](https://www.subconscious.dev/compare/typesafe-ai-vs-streamlake.md)
- [TypeSafe AI vs Wafer](https://www.subconscious.dev/compare/typesafe-ai-vs-wafer.md)
- [TypeSafe AI vs RunInfra](https://www.subconscious.dev/compare/typesafe-ai-vs-runinfra.md)
- [TypeSafe AI vs Particle.AI](https://www.subconscious.dev/compare/typesafe-ai-vs-particle-ai.md)

## Sources

- [TypeSafe AI](https://typesafe.ai/)
- [Introducing System One Models and Jev](https://typesafe.ai/blog/introducing-system-one-models-and-jev?curius=1940)
- [TypeSafe team](https://typesafe.ai/team)

Pricing and model lineups change often; figures are a snapshot.