Breaking: Browser Use + Jev = Ultrafast ⚡ Findings flights took 7s and cost only $0.0039 🤯 > new action space every step > DOM state space > small LLM fallback to type (this video is at 1x speed btw) Built a tiny open source browser agent. try it below ↓
Building a Harness with Jev (LangChain)
LangChain's langchain-typesafe integration exposes Jev as a TypeSafeClassifier plus experimental model-routing and auto-mode middleware that screens risky tool calls before execution.
- Category
- Tools & Integrations
- Published by
- Community
- Author
- LangChain
- Added
- 2026-09-20
Tagscommunityintegrationpythonagentsrouting
Highlights
- TypeSafeClassifier.invoke() accepts text, structured data, or LangChain messages.
- AutoModeMiddleware checks and blocks risky tool calls before they run.
- ModelRouterMiddleware picks a per-run model from the first user message.
Watch out
The middleware beyond the classifier is experimental and may change between releases.
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From the community
Posts from builders shipping with Jev right now.
Browser Use Ultrafast, powered by Jev
A really smart switch statement
hype-free explanation of jev: jev does not replace gpt / claude jev is just a *really* smart switch statement like if 2016 ml classifiers got 2026 levels of intelligence it's a new* type of tool that will make a lot of workloads insanely fast, cheap, and accurate * = and by Show more
@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