artificialbuilds

Comparison

Cloudflare Clef vs Jev

People have published 126 builds with Cloudflare Clef and 180 with Jev, overlapping in 8 use cases. Jev has more coding, agents, productivity.

Cloudflare Clef

Clef (27B) and Clef-flash (9B) are Cloudflare-trained open-weight (Apache 2.0) multimodal decision models: given a state and typed questions they return bounded structured answers with probabilities in one forward pass, Jev/System One API compatible, hosted on Workers AI with a 64k context. Launched alongside a new RL fine-tuning platform.

126
Entries: 118
Creators: GitHub, YouTube, Hacker News
Top source

Jev is TypeSafe AI's first public System One decision model: it answers closed questions (labels, yes/no, scores, choices) with structured output in milliseconds for a fraction of a cent, rather than generating prose.

180
Entries: 164
Creators: X, GitHub, Web
Top source

Same use case, side by side

Use caseCloudflare ClefJev

Coding

Cloudflare Clef · 11 entriese2e + Clef: end-to-end app testing driven by a decision model

Jev · 29 entrieslaya: Non-autoregressive System 1 decision engine. Typed choice, score and y

Agents

Cloudflare Clef · 15 entriesClefMCP: offline MCP server exposing Clef-Flash to agents

Jev · 23 entriesFlight search with Browser Use

Productivity

Cloudflare Clef · 3 entriess1: a voice-first macOS agent

Jev · 35 entriesSmart copy and paste that decides what to paste

Dev tools

Cloudflare Clef · 31 entriesJurl: curl that reads the page for you

Jev · 2 entriesSemantic 'did you mean' wrapper for CLI subcommands

Games

Cloudflare Clef · 8 entriesClef (Balatro) playing and beating ante 8 offline on one RTX 5090

Jev · 24 entriesJev plays Doom

Research

Cloudflare Clef · 18 entriesClef Lab: German decision tasks, Clef Flash versus Jev

Jev · 13 entriesJev-guided sparse attention speeds up MiniMax H3 video generation

Education

Cloudflare Clef · 24 entriesCloudflare Just Challenged Jev, So I Tested Their New Model (Clef)

Jev · 3 entriesReadwithjev: live emotion highlighting while you read

Automation

Cloudflare Clef · 3 entriesry: an AI router for 404 pages powered by Clef

Jev · 12 entries500 emails for 3.5 cents

Top builds with Cloudflare Clef

1
Cloudflare Just Challenged Jev, So I Tested Their New Model (Clef)on YouTube:Better Stack· 64K views64K views
2
Say Hi to Clef. Better Open Source Jevon YouTube:CoderOne· 19.6K views19.6K views
3
Clef: Open-source decision models, and new RL fine-tuning platformon YouTube:Signal Coders· 17.3K views17.3K views
4
Cloudflare Clef: Free Open Source AI Decisions in 38mson YouTube:Prism Labs· 13.9K views13.9K views
5
Cloudflare Clef : The #1 Open Source Alternative to Jev Is Hereon YouTube:Codedigipt· 10K views10K views

Top builds with Jev

1
NandhaKishorM/laya
laya: Non-autoregressive System 1 decision engine. Typed choice, score and yon GitHub:NandhaKishorM· 31.4K stars31.4K stars
2
jev-ultrafast: Fastest and cheapest web agenton GitHub:browser-use· 22.3K stars22.3K stars
3
kev: Jev-like family of decision models built on top of Qwen3.5/3.8 you canon GitHub:jaredpalmer· 8.6K stars8.6K stars
4
jev-chat-jarvis: The chat decision assistant: before you reply, Jev reads the chat, judon GitHub:jev-chat· 7.4K stars7.4K stars
5
fast-jev-compaction: Claude Code plugin that replaces the compaction summary with Jev…on GitHub:tamaratran· 7.5K stars7.5K stars