Open decision models and reproductions with decision models

Inception's decision model on OpenRouter, with a free route, cited by Inception at up to 14 decisions per second.

Small personal model trained in the spirit of Jev; few public details beyond a one-line description.

SGLang's native /v1/decisions and /v1/systemone endpoints that read option probabilities from a validated chat model's next-token scores.

LangWatch comparison of Jev against seven open models under 1B on 15 decision tasks, with intervals, latency and contamination checks.

Paper introducing an encoder-only System One model for Chinese with domain fine-tunes and the CJ-Bench benchmark.

Paper evaluating zero-shot Jev 1.13 on 37 datasets against Qwen and Gemma option probabilities, with code and raw responses released.

Paper introducing PixelJev, a native-image decision interface on small open multimodal models with few-shot adaptation.

Independent directory of about 950 projects built on the open Laya decision model, browsable by platform and use case.

Ollama blog post: Ollama serves the /v1/systemone decision endpoint locally since 0.35, starting with nimble and tev1 models.

Head-to-head eval page where TrustedRouter's gev-1.0 outperforms Jev on the same JevBench questions and also accepts images.

Japanese article testing whether LLMs can replicate Jev, via a logit shortcut on Gemma and the Mario harness.

Unsloth desktop app docs page: serves LAYA and Clef decision models locally through a TypeSafe-compatible /v1/systemone API.

Reddit announcement of a multimodal open decision-model family (0.6B to 27B) reporting first place on both Decision Index boards.

Hacker News thread on Decision Index 0.2.1, which compared about 70 open reproductions of Jev's decision model.

Chinese X post rounding up five promising open Jev replicas: Laya 421M, Decider-2B, NanoJev 0.6B, Reflex and System-One 4B.

Cua's X announcement of CUA-S1, a family of small open System One models specialised for computer use, starting with form filling.

X thread arguing Jev's speed comes from parallel decoding, so a Jev-like API can sit over any open-weight model.

Social post about a public Jev-shaped API served by an open Qwen3.6-35B-A3B model so anyone can try typed decisions.

X post: a builder reports a small MLP on top of Qwen 4B already reproduces Jev-like decision behaviour.

Show HN thread announcing an open-source decision model that its authors claim beats TypeSafe Jev.

Hacker News thread about an open-source Jev alternative built on Qwen-2.5-1B with RLCD training.