TypeSafe AI
Founded 2024 by CEO Diogo Almeida (ex-OpenAI, co-inventor of RLHF/
InstructGPT) with co-founders Erik Gafni and Sasha Sheng. Exited stealth 2026-09-15 with a
200M valuation, releasing its first model, Jev,
into early access the same day.
Builds “System One Models” — a new model category trained with RLCD (Reinforcement
Learning for Calibrated Decisions), TypeSafe’s alternative to RLHF, targeting fast,
calibrated, structured decisions for software automation rather than chat.
Related
- Diogo Almeida — founder/CEO
- Jev — flagship model