reflex
Small open decision model on Qwen3.5: state plus typed questions to calibrated probabilities.
Open-model replicasSDK or client library
Home / Open models and replicas
Open models and replicas
44 entries
Useful for: Open-model replicas
10open-alternative-jev
Typed, calibrated decisions from any open-weights model in one forward pass, on Hugging Face and vLLM.
Open-model replicasClassification and extraction
OpenJev by razorback16
Jev-compatible decision server on DiffusionGemma 26B through vLLM, images included, hosted free on [Codiv](https://codiv.ai).
Open-model replicasSDK or client library
local-jev
Offline server wire-compatible with the System One endpoint, checked against the official SDK; reports 80.5 percent on JevBench's public items against 86.6 percent published for the hosted API.
Open-model replicasModeration and safety
Rizzo Flow
Local-first take on the System One idea: unstructured state in, typed probabilistic decisions out, without generating a token.
Open-model replicasSDK or client library
Valen
Multimodal decision model on Qwen3.5 that scores candidates against images and video as well as text, with training code and open weights.
Open-model replicasSDK or client library
JevK5
Qwen3.5 replica with distilled LoRA weights, ranked second of 76 systems and first among open ones on JevBench v1.4.
Open-model replicasBenchmarks and evals
OneJev
Open multimodal System One model, 0.8B to 27B, for screenshots, photos, video and text.
Open-model replicasPlaygrounds and demos
WaterSheep
Open-weight ModernBERT-base fine-tune that answers Noul, Choice, Score, and multi-label questions with a probability per option, serves `/v1/systemone` for the official Python SDK, and runs in the browser through ONNX; independent replica, not TypeSafe weights.
Open-model replicasSDK or client library
Useful for: Playgrounds and demos
7
NanoJev
0.6B replica with parallel decisions, dynamic candidates, and an end-to-end training pipeline.
Playgrounds and demosBenchmarks and evals
jevfire
Parallel decisions for CUDA LLMs through a vLLM API, with game-agent examples and benchmarks.
Playgrounds and demosGames and simulation
litjev
Turns any off-the-shelf LLM into a Jev-style decision layer.
Playgrounds and demosSDK or client library
simple-jev
Reads next-token logits from any Hugging Face model for choice, rubric, and support questions; public demo API with no key.
Playgrounds and demosClassification and extraction
openjev by daseinlabs
Prefills once and scores every option in one padded pass on Gemma 3 4B with MLX; plays Doom from the terminal in the demo.
Playgrounds and demosBenchmarks and evals
PlayJev
Plays ten browser games from the frame alone on a fine-tuned Qwen3.5-0.8B, one forward pass per move, open weights and a browser demo.
Playgrounds and demosBenchmarks and evals
djev
Serves `/v1/systemone` on DiffusionGemma by reading typed answers and text spans off a seeded, pinned canvas, with no generation.
Playgrounds and demosBenchmarks and evals
Useful for: Benchmarks and evals
6mini-jev
Preregistered experiment on a frozen Qwen3-4B: read the option letter's logits, skip the JSON.
Benchmarks and evalsClassification and extraction
Verdict-open-jev
Non-autoregressive decision engine on ModernBERT with calibrated uncertainty and an in-browser WebGPU playground.
Benchmarks and evalsPlaygrounds and demos
jev-on-a-laptop
Study of Jev-style decisions on stock 1.5B to 8B models on a laptop, with a Hugging Face demo.
Benchmarks and evalsPlaygrounds and demos
typesafe-ai-benchmark
LLM gateway that mimics the TypeSafe response shape, useful as a stand-in while you wait for a key.
Benchmarks and evalsOutput verification
JevForge
End-to-end stack for auditable data construction, Qwen3.5-0.8B training, fixed Mind2Web and OOD evaluation, local serving, and a preliminary RLCD baseline.
Benchmarks and evalsPlaygrounds and demos
metask-jev
Open-weight typed-decision models on Qwen3.5 with calibrated per-option probabilities in one forward pass; reports 80.1 percent on JevBench against 75.3 for Jev 1.13.
Benchmarks and evalsClassification and extraction
Useful for: Classification and extraction
5jevlike
Open option scorer that reads candidate logits instead of generating JSON.
Classification and extractionPlaygrounds and demos
jevmlx
Parallel constrained decisions for any MLX model on Apple Silicon, one forward pass.
Classification and extractionPlaygrounds and demos
system-one-open
Typed calibrated decisions in one forward pass on Gemma 4 E2B and Gemma 3 270M.
Classification and extractionPlaygrounds and demos
LLM2Jev
Adapts local language models to runtime-defined Choice, Score, and Noul questions and returns typed answers with probabilities.
Classification and extractionSDK or client library
AnyJev
Turns an open Hugging Face model into a calibrated decision endpoint served through vLLM, with no fine-tuning at the first two levels.
Classification and extractionBenchmarks and evals
Useful for: SDK or client library
5jev-visual
Educational visual-inference variant on Apple Silicon: shared context, direct candidate scoring.
SDK or client libraryCommand line tooling
kev
LoRA adapter and readout head on Qwen2.5-0.5B that answers many typed questions in one prefill; trains in under two hours on a MacBook, held-out ECE 0.065, speaks the TypeSafe wire format.
SDK or client libraryOpen-model replicas
jeff by logan-markewich
Self-hosted System One API on the 400M GLiFormer, with benchmarks that say where it trails Jev.
SDK or client libraryOpen-model replicas
Jev-Compatible
Gateway that turns an existing SGLang or vLLM deployment into a Jev-compatible decision service by scoring candidate tokens, with no training and no model changes.
SDK or client libraryClassification and extraction
AgentJev
Decision model on Qwen3-0.6B that answers without decoding tokens, reports 79.25 percent top-1 on the public Typed Decisions benchmark.
SDK or client libraryTool gating and guardrails
Useful for: Model routing
3jevbetter
A stronger one-pass scorer with a head-to-head benchmark against the jevlike starter design.
Model routingBenchmarks and evals
von
Non-autoregressive open decision model reporting under 15 ms locally, as a drop-in alternative to Jev.
Model routingBenchmarks and evals
tev1
Data recipe and training code that fine-tune Qwen3.5-4B into an open-weight decision model on Together AI.
Model routingClassification and extraction
Useful for: Output verification
3openjev by zhihz
Bilingual local decisions from context, questions, and candidate answers.
Output verificationBenchmarks and evals
open-jev
Typed JSON inference with DiffusionGemma, benchmarked against Jev.
Output verificationBenchmarks and evals
openJev-verdict-2.0
Non-autoregressive 151M decision engine with a WebGPU browser runtime, reporting 77.1 percent top-1 and 1.44 percent calibration error on its own benchmark.
Output verificationBenchmarks and evals
Useful for: Tool gating and guardrails
3
SemIf
Semantic ifs from open models on a single 3090; the most starred independent replica, formerly openjev.
Tool gating and guardrailsClassification and extraction
openvons
Open decision layer answering a finite option set with probabilities split into execute, confirm, and reject. Independent replica, not TypeSafe weights.
Tool gating and guardrailsOutput verification
ollaya
Pulls and serves open decision models such as Laya, kev, and JevK5 behind a TypeSafe-compatible local endpoint, the way Ollama serves LLMs.
Tool gating and guardrailsSDK or client library
Everything else
2openjev-sglang
Jev-compatible API endpoint on SGLang, prefill only.
Parallel constrained decoding
Hugging Face Space demonstrating RLCD-style parallel decoding on Qwen2.5-1B.