Company
TypeSafe AI: the company behind Jev
Who they are, what they have raised, the one product they sell, and how to get a key. Written by an independent site from the company's own published material — with the gaps left as gaps.
Quick answer · verified 2026-09-19
What is TypeSafe AI, in one paragraph?
TypeSafe AI is an AI lab whose bet is that decisions and text are different jobs. Its model, Jev, does not write: it takes a state and a set of typed questions and returns a chosen option, a score or a probability, each with a confidence — the “System One” to a chat model's “System Two”.
| Product | Jev — the first System One model |
|---|---|
| Out of stealth | September 15, 2026 |
| Funding | $40M seed round led by DCVC |
| Co-founder | Diogo Almeida, former OpenAI researcher and RLHF co-inventor |
| Pricing | $0.042 per 1M input tokens — output is free — none is generated |
| Access | Closed API, early-access waitlist |
The company
- Name
- TypeSafe AI
- Website
- typesafe.ai
- Announced
- September 15, 2026, alongside the Jev launch
- Funding
- $40M seed round led by DCVC
- Co-founder
- Diogo Almeida, former OpenAI researcher and RLHF co-inventor
- Product
- Jev — a closed, managed decision API
- Open weights
- None. No self-hosting or VPC option is offered.
- Customer data
- Not trained on customer requests or responses. Zero data retention is available to enterprise customers.
That is the whole of what the company has published about itself that can be checked. Headcount, location, other founders and revenue are not on its public pages, and this site does not fill the gaps from secondary sources — when they publish it, it will be here with a link.
The product: Jev
One endpoint, https://api.typesafe.ai/v1/systemone, and three question types — Choice, Score and Noul. You send a state and any number of questions; every question is answered in the same forward pass, in 70–500ms end-to-end, and billed at $0.042 per 1m input tokens with nothing charged for output because no output tokens exist. The model is jev-1.13.0, reachable through the aliases jev-latest, jev-preview, jev-1.13.0.
What it is for, where it fails and what it costs at scale are each their own page: what a System One model is, limitations, pricing and our own measurements.
Getting access
Closed managed API. Early-access waitlist on the TypeSafe console; API keys issued in batches. The waitlist is on the company console at typesafe.ai; no wait time is published. While waiting, the model is resold through OpenRouter and the Vercel AI Gateway under the id typesafe/jev-1.13, and this site issues a free key against an endpoint that mirrors the official request shape. The full walkthrough is on getting started.
Frequently asked
What is TypeSafe AI?
TypeSafe AI is the company that builds Jev, the first of what it calls System One models — models that return a decision with a probability distribution instead of generating text. It came out of stealth on September 15, 2026 with $40M seed round led by DCVC.
Who founded TypeSafe AI?
Co-founder Diogo Almeida, former OpenAI researcher and RLHF co-inventor. Other founders and the full team are not listed on the company's public pages at the time of writing, and this site does not guess.
What does TypeSafe AI sell?
One product: the Jev API, a closed managed service at POST https://api.typesafe.ai/v1/systemone. It takes a state and typed Choice, Score and Noul questions and returns every answer in one call, priced at $0.042 per 1m input tokens with no output tokens. There are no open weights and no self-hosted option.
How do I get access to TypeSafe AI's API?
Closed managed API. Early-access waitlist on the TypeSafe console; API keys issued in batches. Until a key arrives, Jev is also resold through OpenRouter and the Vercel AI Gateway, and this site issues a free key against the same request shape.