you can make any open source model behave like jev with just a bit of inference engineering. it's shockingly easy. to prove it, we built a new endpoint we're calling deepseek-v4.1-flash-jev. see the demo below. here's how it's done: sglang (an inference engine) offers a Show more
CommunityPractices & Patterns
Run a Jev-Style Model on Your Own GPU
A local-inference walkthrough that compares Kev, SemIf, Von, and OpenJev on consumer hardware, including Brier scores and a fake-probabilities warning.
- Category
- Practices & Patterns
- Format
- Video
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- Community
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- Cloud Codes
- Added
- 2026-09-25
- Last verified
- 2026-09-25
Highlights
- Claims KV-cache sharing lifts throughput from 2 to 20+ decisions per second on one consumer GPU.
- Reviews Kev sizes, SemIf on an RTX 3090, Von's 395M CPU model, and OpenJev's multimodal path.
- Reports 81 to 85% local accuracy against Jev's 88% and warns about fake self-reported probabilities.
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Reactions & coverage
Posts, threads, and videos about this entry from around the web.
Hacker News: Jev implemented in 25 lines of Python
bashbjorn400 points · 128 commentsJev in 25 Lines of PythonRead the thread on Hacker NewsHacker News: Kev: a tiny Jev-like family built on Qwen3.5
tosh458 points · 199 commentsKev: Tiny Jev-like family of decision models built on top of Qwen3.5Read the thread on Hacker NewsX: deepseek-v4.1-flash-jev
Reddit: A walkthrough of routing between models with Jev.
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An independent baseline that reads typed option probabilities straight from a frozen Qwen3.5-4B's logits in one forward pass, reproducing Jev's interface pattern with open models rather than Jev's undisclosed model or training.
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TheoLeeCJ/SemIfPython
TheoLeeCJ/SemIfPythonFrom the community
Posts from builders shipping with Jev right now.
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Built a live tool using @typesafeai JEV ! See live comparison btwn GPT & JEV at gptvsjev.vercel.app Get benchmarks like Money Spent ! Time Taken ! Tokens Used!
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Secret detection with Jev, tested
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Jev Driving Lab: a playground for System One models
@typesafeai (and System One models in general) have a lot of uses, and fun to play with. New paradigm open to public now. This is a self-driving sim I spun up to test Jev today. Structured sensor state in, typed driving decisions out, steer, brake, overtake, pedestrians, speed Show more
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@CompleteSkeptic
After co-inventing ChatGPT, I kept asking myself: why have superhuman chat models not led to AGI? I’ve spent the last 2 years in stealth building a new way to train models (RLCD), and a new type of frontier AI model that we are releasing today: Jev • 20-200x faster • 40-400x