They were building in stealth for 2 years, I was building in stealth for 2 hours

Happy to open source Qwen-2.5-1B-RLCD, 5x faster on-device inference for JSON workloads that need to be type-safe.

Seventeen hours after TypeSafe announced Jev, Harsha Gundal made a Qwen model play Doom with a claimed 150-millisecond latency. This is not a reverse-engineering of Jev: TypeSafe has not published its architecture or training method. It does reproduce the legible product trick, reusing an ordinary model’s state to score closed choices in parallel instead of typing JSON one token at a time.

That makes Jev more interesting and TypeSafe less defensible. A useful abstraction can be real while a startup’s moat is not. If two years of stealth can be approximated with an inference mode for Qwen before dinner, TypeSafe has to prove its training produces better decisions; speed and schema validity have already escaped.