Overview
TypeSafe AI is a startup founded by diogo-almeida (ChatGPT/RLHF co-creator) releasing jev — first public System One model for calibrated structured decisions.
Key Points
- 2026-10-09: 7.5B valuation led by a16z; Sequoia, DCVC, angels; Martin Casado joins board (2026-10-09-typesafe-jev-870m-7-5b-valuation, 2026-10-09-typesafe-series-a-a16z)
Fortune 500 adoption cited as one-third (TypeSafe) vs 25% (a16z blog) — company/partner claims, not audited.
- 2026-09-30: openai unveiled decisions-api at DevDay — functionally mirrors jev; CEO diogo-almeida joked about “clone wars” on X (2026-09-30-openai-decisions-api-jev-clone)
- 2026-09-14/18: Jev early access; API demand briefly exceeded capacity
- Training via rlcd on synthetic data; architecture details largely undisclosed
- Pricing: input per billion tokens; output tokens free