Sam Witteveen walks through seven open Jev-style models
On 20 September 2026, Sam Witteveen published Open Jev Models Are Here!! (~21 min): a sponsored local “control room” demo of seven open Jev-style stacks, framed against hosted TypeSafe Jev and a community JevBench composite (intelligence / calibration / speed / cost).
Models he demos that ModelSystem.One already catalogs: Nimble, Decider, NanoJev, Laya, and DiffusionGemma-as-Jev via djev-spark. SemIf stays method/infra (docs/04) — frozen-logit readout, not trained decision weights.
New on the map from this roundup: openjev (AlexWortega/openjev) — Qwen3.5 NLI cross-encoder with multimodal v2 demos (checkout UI entailment, Doom, Minecraft).
UnverifiedClaim / hygiene: on-screen JevBench rankings (e.g. classifier.dev ~84.8, Jev ~75.3, SemIf ~74.6) and per-model ms / decisions-per-second figures in the video are third-party or author demo timings — not ModelSystem.One benches. Sam also flags TypeSafe TOS language that restricts customer benchmarking of Jev.
Primary source: youtu.be/53wDOI_7x8I. JevBench: benchmarkheaven.com/jev-models.