TypeSafe AI released Jev, a model from an RLHF (reinforcement learning from human feedback) co-inventor that does not generate text.

You send it state and typed questions. It returns decisions with probabilities
your code can branch on, so there is nothing to parse.

- Founder Diogo Almeida co-invented RLHF at OpenAI
- $40M seed round led by DCVC
- 3 primitives: Choice, Score, Noul
- Every question in a request scored in parallel
- $0.042 per 1M input tokens, output tokens free
- 70ms to 500ms end to end, vendor reported
- 0.114s vs 8.566s in TypeSafe's own recorded demo
- Vercel: up to 18x faster than GPT Luna, p95
- Listed on Vercel AI Gateway as typesafe-ai/jev

Confidence is the product. Your code sets the threshold where automation stops
and a human takes over.

The 193.6x faster and 444.6x cheaper claims come from TypeSafe's own evals, not independent tests.

Read the full analysis: https://www.marktechpost.com/2026/09/19/typesafe-ai-releases-jev/

Technical details: https://typesafe.ai/blog/introducing-system-one-models-and-jev

Join the waitlist: https://typesafe.ai/