SemIf
Semantic ifs from open models, on a 3090 at home. Independent; not affiliated with Jev or TypeSafe.
Jev alternatives & open source
Independent projects exploring Jev-style typed decisions with open models or local and self-hosted runtimes. Maturity, licensing, and reported results vary by project. Browse the collection in Jev Library.
21 entries in this collectionJev alternatives & open source Jev alternatives & open source open-jev (JoshuaSP)
Typed JSON inference with DiffusionGemma, with Every and Jev benchmark results
Jev alternatives & open source openvons
openvons (open-Jev): 有限選択肢に確率で答える判断層 — テキスト / 画像 / 日本語音声コマンド
Jev alternatives & open source open-jev (daseinlabs)
One-pass option scoring with a local Gemma 3 4B on Apple silicon via MLX, inspired by jevlike, with a Doom demo.
Jev alternatives & open source openjev (zhihz)
Local bilingual probability decisions from context, questions, and candidate answers. Independent research preview inspired by TypeSafe Jev.
Jev alternatives & open source system-one-open
Open replica of TypeSafe's Jev: typed calibrated decisions in one forward pass, on Gemma 4 E2B / Gemma 3 270M (Modal)
Jev alternatives & open source system-one-gemma
Open-source Jev-style System One decision model. Gemma 3 270M with a scoring head — fast, calibrated decisions in a single forward pass. No text generation. Inspired by TypeSafe.ai's Jev.
Jev alternatives & open source Verdict-open-jev
Non-autoregressive decision engine on ModernBERT (151M) with calibrated uncertainty (RLCD), TypeSafe AI Jev benchmark audit, and in-browser WebGPU playground
Jev alternatives & open source open-alternative-jev
Open alternative to Jev: typed, calibrated decisions from any open-weights LLM in one forward pass (HF + vLLM), with benchmarks
Jev alternatives & open source jev_local
Replicating Jev with a local LLM
Jev alternatives & open source von
The open-source System One decision model. Sub-15ms, non-autoregressive, local drop-in alternative to TypeSafe Jev.
Jev alternatives & open source openJev-verdict-2.0
Calibrated 151M Non-Autoregressive Decision Engine beating TypeSafe Jev & Laya on LocalLLaMA/typed-decisions (77.10% acc, 0.0636 Brier, 0.0144 ECE)
Jev alternatives & open source OpenJev (zhangcy122)
OpenJev: Open-source alternative to TypeSafe Jev. Typed probabilistic decision API (Choice, Noul, Score) powered by open LLMs & constrained logprob calibration.
Jev alternatives & open source open-jev-typed-decision-engine
Open reproduction of TypeSafe Jev: a 150M typed decision engine (noul/choice/score in one non-autoregressive pass, calibrated confidence). 0.697 vs Jev's 0.727, 2.5x better calibrated, 4x faster, free. Trains on a Colab T4 in 30 min.
Jev alternatives & open source local-jev
A local, offline System One server compatible with TypeSafe's Jev API. It answers typed yes/no, category and score questions with small open models.
Jev alternatives & open source AnyJev
Turn any LLM into a Jev-style decision model: typed decisions, real probabilities, no training. (continue updating)
Jev alternatives & open source Kev
Open-source System One decision engine. Typed choice / score / noul with calibrated probabilities. Self-host with Ollama or any OpenAI-compatible model. Apache-2.0.
Jev alternatives & open source system-one (mpuig)
An open-source System One decision model — Kahneman's term for the fast, automatic judgment faculty. Calibrated choice/score/noul probabilities in one forward pass on small fine-tuned open models. Local on Apple Silicon (MLX), Jev-compatible API, audited experiment log.
Jev alternatives & open source jevk5
JevK5: open-weight alternative to TypeSafe Jev. Typed decisions with probabilities in one forward pass; Apache-2.0 weights and code.
Jev alternatives & open source sys1
System One compatible API for open decision models, e.g. Laya, written in Rust.
Jev alternatives & open source ollaya
Run open decision models locally — pull, run and serve Laya and other open Jev alternatives behind a TypeSafe-compatible API.