THE JEV GUIDE · CURATED EDITION

Software development.

Launch news, explanations, demos, and community projects around TypeSafe Jev, organized by topic. Every entry links back to its X source.

Curated selection · Not exhaustive · Updated manually

6757curated posts
3414original videos

Combining Jev with Tests

James LePage suggests that combining something with TypeSafe AI's Jev can lead to good tests.

Combining Jev with Tests · original post image 1

First Benchmark Run: LFM3-VL-2B on JevBench

John Wong shares LFM3-VL-2B's JevBench results after 200 LoRA steps with a frozen backbone: dev 0.657 / test 0.452, noting it's not comparable to the closed-source 0.996, currently ~10 points behind the best open-source model of similar size, and 25–30 points behind Jev itself. Further optimization is planned.

First Benchmark Run: LFM3-VL-2B on JevBench · original post image 1

Beating OpenRouter's Jev Router on OSS Bug Fixes

This post claims their router outperforms OpenRouter's Jev Router and Auto router on pytest-graded bug fix tasks, with higher consistency (94.4% vs 72.2% vs 16.7%), lower cost per task, and lower latency.

Beating OpenRouter's Jev Router on OSS Bug Fixes · original post image 1

Shadow Deployment and AI QA Mechanism via Jev

Introduces a system built with Jev that combines shadow running, AI quality inspection, quick switching, and instant rollback, demonstrating an innovative Jev use case in software engineering.

Jev Optimizes Coding Tasks: Cut Cost per Task from $6.42 to $2.00

In one coding task, four key changes deliver major cost savings: smarter notes selection saves 23.7%, moving decisions to Jev saves 51.2%, proper recovery paths save 58.1%, and routing to a fast worker saves 68.8%. Each lever stacks on the last, cutting cost from $6.42 to $2.00.

Jev cuts coding agent bill by 68.8%

Jev makes four decisions—context, routing, recovery, and testing—to cut coding agent costs by 68.8%, while Opus 5.5 writes the code.

The Paradigm Shift with Jev Decision Model

When working with a decision model like Jev, don't make another AI call just because your code took a different branch. Ask more questions all at once.

AI Newsletter #26: Jev Model & Dev Tools

This issue covers Atlassian's AI SDLC transformation playbook, an explanation of the Jev model (which doesn't generate text), Pinterest's agent-ready metrics layer, ClaudeDevs cost-cutting improvements, and daily LLM release & pricing tracker. Link

AI Newsletter #26: Jev Model & Dev Tools · original post image 1