Oct 7, 2026 · awesomeclef.com
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The community directory of projects, tools, SDKs, experiments and resources built with Cloudflare Clef. Stars refreshed daily from GitHub.

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110 Entries,
64 Stars.

*96 GitHub repos, 24 live sites, 5 articles and threads. Refreshed 2026-10-07.

CLEF · SPEC SHEEToct 1, 2026
models@cf/cloudflare/clef (27B) · @cf/cloudflare/clef-flash (9B)
runtimeWorkers AI: env.AI.run(), or the REST API
inputstate (text, JSON, image, video) + up to 64 typed questions
outputtyped answers with a probability for every allowed option
context65,536 tokens
pricing$0.24 / MTok input (clef) · $0.09 (clef-flash)
weightsclef · clef-flash · Apache 2.0
apiJev / System One compatible · launch post
PRIMITIVES3
noulis this statement true? → probability 0–1
choicepick one option from criteria → choice, probabilities, confidence
scorerate the state on ordered levels → probability-weighted score
const response = await env.AI.run("@cf/cloudflare/clef-flash", {
  model: "clef-flash",
  state: "Checkout has been failing for every customer for the last hour.",
  questions: {
    urgent: { type: "noul", instructions: "Is this support request urgent?" },
    team: {
      type: "choice",
      instructions: "Which team should handle this request?",
      criteria: {
        billing: "Payments, invoices, and refunds",
        technical: "Outages, errors, and configuration",
      },
    },
  },
});

console.log(response.answers.team.choice);
MOST STARREDtop 4 · built since launch
★ 31 clef-webcam Run Cloudflare's clef-flash decision model locally on your webcam. lucataco · HTML ★ 11 ry Ry stands for route yes: an AI router for 404s, powered by Cloudflare Clef. ygwyg · TypeScript ★ 7 ClefMCP Local MCP server exposing the Cloudflare Clef-Flash decision model to AI agents — structured decisions with probability outputs, fully offline via llama.cpp. HighlyLoadedEgo · TypeScript ★ 3 cleffa Native C11 + Metal inference engine for Cloudflare Clef and Clef-Flash on Apple Silicon (BF16, Jev/SystemOne API). Built after ds4. zknpr · Python
FILTER110 shown
01 · Official8 entries

Docs, weights, and announcements from Cloudflare.

ProjectDescriptionLangStarsLinks
Introducing Clef (launch post) Cloudflare's announcement of the Clef and Clef-flash open-weight decision models and the RL fine-tuning platform, with benchmark results. — — [link]
Clef on Workers AI Model page for @cf/cloudflare/clef, the 27B multimodal decision model: usage, input/output schema, context window, and pricing. — — [link]
Clef-flash on Workers AI Model page for @cf/cloudflare/clef-flash, the fast 9B decision model: usage, schema, and pricing. — — [link]
Clef weights Open weights for Clef (27B) on Hugging Face, Apache 2.0 licensed. — — [link]
Clef-flash weights Open weights for Clef-flash (9B) on Hugging Face, Apache 2.0 licensed. — — [link]
Clef evals dashboard Cloudflare's interactive results for Clef and Clef-flash across the evaluation suite from the launch post. — — [link]
Clef RL fine-tuning interest form Sign-up for Cloudflare's reinforcement-learning fine-tuning service for Clef, delivered first through forward-deployed engineers. — — [link]
langchain-cloudflarecloudflare LangChain integrations for Cloudflare. Includes decision-model support for Clef and Clef-flash on Workers AI, with a notebook and Workers example. Python ★ 41 [repo]
02 · SDKs & integrations7 entries

Client libraries, framework integrations, and gateways with Clef support.

ProjectDescriptionLangStarsLinks
yoagentyologdev Rust agent loop with a decision module and a Workers integration, including a Clef worker example. Rust ★ 337 [repo][site]
cc-routerfinch-xu Desktop LLM gateway that aggregates provider quotas for Claude Code and similar tools; ships a Cloudflare Clef provider. Rust ★ 271 [repo][site]
neurolinkjuspay Multi-provider AI SDK with a Cloudflare Clef provider for calibrated decide() calls alongside generate and stream. TypeScript ★ 143 [repo][site]
PSAICloudflareClefdfinke PowerShell module for Cloudflare Workers AI Clef typed decisions. PowerShell ★ 2 [repo]
clefluandro Jev-compatible System One API proxy for clef and clef-flash, running on Cloudflare Workers. JavaScript ★ 0 [repo]
clef-serverassb-lab Inference server and Python client for Cloudflare Clef / Clef-Flash (Jev/SystemOne API). Python ★ 0 [repo]
n8n-nodes-system-onediegohh0411 N8n community node for System One decision models (Jev, Clef) via OpenRouter, TypeSafe, Cloudflare Workers AI, or any compatible endpoint. TypeScript ★ 0 [repo]
03 · Agents & tooling21 entries

Routers, gates, MCP servers, and skills that put Clef inside coding agents and agent loops.

ProjectDescriptionLangStarsLinks
holonholon-run Agent workbench for ongoing work with a pluggable decision subsystem; Cloudflare Clef is its first decision backend. Rust ★ 152 [repo][site]
claude-routeralexei-led Claude Code plugin that auto-picks the right model for each turn — micro, low, medium, or high tier — using Jev/Clef routing. JavaScript ★ 10 [repo]
ClefMCPHighlyLoadedEgo Local MCP server exposing the Cloudflare Clef-Flash decision model to AI agents — structured decisions with probability outputs, fully offline via llama.cpp. TypeScript ★ 7 [repo][site]
pi-model-routeralexei-led Pi extension for four-tier model routing with budget controls and fallbacks; can use Cloudflare Clef as a routing advisor. TypeScript ★ 6 [repo]
clef-routerGjusev Route prompts between cheap and frontier LLMs with Cloudflare's Clef decision model. OpenAI-compatible proxy + library. Python ★ 2 [repo][site]
clef-model-routerAbelNavarro Claude Code mod that uses Cloudflare Clef to automatically select the model and reasoning effort for each turn. TypeScript ★ 1 [repo]
oddsacoyfellow Ask for odds, not prose. Clef decision models in Pi codemode through your own authenticated AI Gateway. TypeScript ★ 1 [repo][site]
building-with-decision-modelsaaddrick Unofficial skill for building with decision models (Jev, Clef, pplx-decider, ai_decide, Ollama): typed decisions, calibrated confidence, provider differences, and prior art sorted by implementation shape. Python ★ 0 [repo]
clef-gatedwain-barnes Claude Code mod: asks a local Clef decision model whether a tool call or subagent is needed before paying for it. TypeScript ★ 0 [repo]
clef-model-router (dwain-barnes)dwain-barnes Claude Code mod that routes each turn to the cheapest sufficient model with Clef; fork adding a fully local backend (llama-server, Ollama). TypeScript ★ 0 [repo]
clef-screen-triagesakamoto-sann Codex skill that hands screen-state checks to Clef-flash, with a Japanese guide and evaluation notes. Python ★ 0 [repo]
jev-mcpdrmedia MCP server for decision models with TypeSafe Jev, Cloudflare Clef, OpenRouter, and local providers. TypeScript ★ 0 [repo]
judge-clefnicolasmertens Tells you when to /compact: exact Claude Code context size per turn plus a Cloudflare Clef judgment of whether now is a good moment. Python ★ 0 [repo]
llama-cot-sentinelu9401066 Step-checked chain of thought for llama-server: a decision model (Clef-Flash) reviews every reasoning step and steers with rollback or reflection. Python ★ 0 [repo]
openwebui-jev-model-routergianlucaravior Routes Open WebUI requests to configured chat models using Cloudflare JEV or Clef. Model selection considers model descriptions, capabilities, context profiles, tools and Voice Mode. Python ★ 0 [repo]
pi-auto-routerlucasamonrc An Auto model for pi: classifies each prompt with Cloudflare Clef (or TypeSafe Jev) and routes it to the best-fitting model you have. TypeScript ★ 0 [repo]
pi-magic8ballneruok Advisory choices for Pi with a neutral context builder and Jev or Clef classifiers. TypeScript ★ 0 [repo]
pi-safelydcowsill Claude Code-style auto mode for pi, gated by System One decision models (Cloudflare Clef via OpenRouter, or TypeSafe Jev). TypeScript ★ 0 [repo]
pi-system-onemastnacek System One intelligent classifier router, tool dispatcher, and JEV/Clef decision engine for Pi coding agent. TypeScript ★ 0 [repo]
pointsmanjadeonstudio Typed decisions and bounded evidence workflows for agents via MCP, CLI and JS; Jev/Laya runtime adapters and reproducible local Laya/Clef evaluation. JavaScript ★ 0 [repo]
skills-cloudflare-cleflyhu Agent skill for local Cloudflare Clef typed decisions, with classic datasets and live browser benchmarks. Python ★ 0 [repo]
04 · Browser & computer use3 entries

Browser, desktop, and mobile automation with Clef choosing the action.

ProjectDescriptionLangStarsLinks
clef-browserzachsents Drive your own logged-in Chrome with Cloudflare's Clef decision model — CLI + MCP server + Chrome extension bridge. TypeScript ★ 0 [repo]
multi-modal-jev-browserfoklepoint A browser agent where a small decision model (Jev, Clef) picks each action and a vision LLM steps in only when it is unsure. CLI, library and MCP server. Python ★ 0 [repo]
veilforce416 Chrome extension that hides X / Twitter replies matching a natural-language condition, judged by Cloudflare Clef. JavaScript ★ 0 [repo]
05 · Applications15 entries

Products, services, and pipelines that call Clef.

ProjectDescriptionLangStarsLinks
jev-searchsuperagents-lab Web search with decision models for source selection, query understanding, and relevance ranking; supports choosing Clef as the model. TypeScript ★ 516 [repo][site]
ryygwyg Ry stands for route yes: an AI router for 404s, powered by Cloudflare Clef. TypeScript ★ 11 [repo][site]
awesome-xRadRebelSam Awesome lists that maintain themselves. Crawls GitHub and npm, has a decision model (Cloudflare Clef or Jev) judge each candidate against one sentence you write, then publishes the README and site. No dependencies. JavaScript ★ 1 [repo][site]
clef-compactorGjusev Query-aware RAG context compaction with Cloudflare Clef: keep the evidence, cut noisy retrieval context. Python ★ 1 [repo]
ai-code-review-agentakshatdodhiya Automated pull-request review agent on Cloudflare Workers: 7-pillar security pipeline, a Clef decision gate, and a multi-model review committee - running entirely on the free tier. Built during ClawBuilders S1:E5. — ★ 0 [repo][site]
cf-pr-reviewerkravchuk-ivan Automated GitHub PR reviewer on Cloudflare Workers: Clef triage, multi-model review committee, inline one-click suggestions. TypeScript ★ 0 [repo]
clef (NikhileshThiru)NikhileshThiru Homelab decision engine running Clef-flash (GGUF) on a 6 GB laptop GPU to triage Gmail, filter news, and watch job boards. Python ★ 0 [repo][site]
clef-ragMersivMedia Clef-steered ingestion and retrieval for any vector database: Cloudflare Workers AI, self-hosted, or local Clef / Clef-flash weights. Python ★ 0 [repo]
clef-theft-detectionYz613 Grocery checkout-loss shrink detection service using Cloudflare Clef (@cf/cloudflare/clef). TypeScript ★ 0 [repo]
cloudflare-compliance-reviewerClawbuilders ClawBuilders S1:E6: a policy-as-code agent committee for GitHub PRs on Cloudflare (Agents SDK, Workflows, R2, Workers AI + Clef, Regorus). TypeScript ★ 0 [repo]
compliance-preview-auditorClawbuilders ClawBuilders S1:E6 bonus: audit a live preview URL with Cloudflare Browser Rendering — axe-core, third parties before consent, and Clef vision. TypeScript ★ 0 [repo]
er-decision-supportzalomea CPU-only research prototype for emergency-department triage support, pairing a small web UI and typed API with a local Clef-flash GGUF model. Python ★ 0 [repo]
LegalClefsomaxito Legal Clefs turns immigration case files into targeted research across French administrative case law. It combines an LLM for legal issue decomposition with Cloudflare’s Clef decision model to classify court decisions at scale and surface arguments, counterarguments, and matching precedents. TypeScript ★ 0 [repo]
quant-decision-enginezinxer Regex reads words, decision models read meaning: a Go reference implementation that gates crypto news signals with Cloudflare's open-weight Clef-flash decision model. Go ★ 0 [repo]
sim4optionsjstdlee Options Quest: learn options trading one decision at a time, with Kon the fox. Vue + Cloudflare Workers, D1, Workers AI (Clef). TypeScript ★ 0 [repo]
06 · Demos & playgrounds12 entries

Playgrounds, games, and small experiments you can run.

ProjectDescriptionLangStarsLinks
clef-webcamlucataco Run Cloudflare's clef-flash decision model locally on your webcam. HTML ★ 31 [repo]
clef-pictionaryjillesme Pictionary where Clef (a decision model on Workers AI) guesses your drawing live. TypeScript ★ 1 [repo]
blind-earth-clef-jevdylanler Blind-Earth land/water maps with Cloudflare Clef / Clef-flash and TypeSafe Jev (System One choice). Python ★ 0 [repo]
bot-clubjackdnl A playful AI nightclub. Cloudflare Clef-flash decides who gets in, live. TypeScript ★ 0 [repo]
clef-airyajdunn2 Mac/Win Electron app for testing Jev, System One, and similar decision APIs inc. local models like Clef with Ollama. Build requests using forms or JSON and explore structured responses. Made with NativePHP. PHP ★ 0 [repo]
clef-demotehtommeh Demo of CloudFlare's Clef decision model https://huggingface.co/Cloudflare/clef-flash. Python ★ 0 [repo]
clef-playgroundszerintedmi Local playground for Cloudflare's Clef decision models (clef / clef-flash): edit state, images and questions; see probabilities, latency and cost. TypeScript ★ 0 [repo]
clef-playground (JordanDalton)JordanDalton Playground for Cloudflare's Clef decision models: typed questions, images, latency and cost. HTML ★ 0 [repo]
clef-playground (sw30labs)sw30labs Run Cloudflare Clef locally on Apple Silicon with an MLX playground, typed decisions, and a SystemOne-compatible API. Python ★ 0 [repo]
clefcamtmchow A camera that follows your rules, powered by Cloudflare Clef Flash. TypeScript ★ 0 [repo]
heistacoyfellow A prompt injection game: get VaultBot, Meta's Llama 3.3 70B on Workers AI, to leak a vault code while Cloudflare Clef scores your message below 0.5. TypeScript ★ 0 [repo][site]
ours-privacy-demojhomra21 Synthetic healthcare consent regression demo with browser evidence and optional Cloudflare Clef assessments. TypeScript ★ 0 [repo]
07 · Benchmarks & evals14 entries

Benchmarks, evaluations, and head-to-head comparisons.

ProjectDescriptionLangStarsLinks
Jev Decision Index Hugging Face Space leaderboard comparing decision models, including Clef and Clef-flash, cited in Cloudflare's launch post. — — [link]
clef-evalsGjusev Calibration-first evaluation toolkit for Cloudflare's Clef decision models. Judge cheap, audit confidence. Python ★ 1 [repo][site]
admission-decision-evalnicia-ai Decision models on a knowledge-base write-admission task: Jev, Clef, Clef-flash. JavaScript ★ 0 [repo]
benchessmarkickas Chess as a benchmark for decision models: Jev vs Clef, graded by Stockfish, with a replay viewer and video export. TypeScript ★ 0 [repo]
blackboxacoyfellow Replay a Pi agent log as a timeline and see which step the Clef model scores as the fault. TypeScript ★ 0 [repo][site]
decision-map-benchmove38studios How well do decision models know geography? Jev, Clef, Clef-flash and Laya on a 2° world grid. Python ★ 0 [repo]
decision-model-benchmarksasopitech-publishing Reproducible Strands, Clef, laya, and Jev decision-model benchmarks. Python ★ 0 [repo]
jev-clef-experimentsedumntg Clef and Jev (System One decision models) driving simulators: cart-pole, double pendulum, Super Mario Bros from pixels. Python ★ 0 [repo]
jev-vs-clefrmax-ai Head-to-head stress comparison of Jev (TypeSafe System One) vs Cloudflare Clef / Clef-flash decision models — launch-week 159-call battery, harness, and raw evidence. Python ★ 0 [repo]
local-decisionmthomas100 Run Cloudflare's Clef decision models locally on Apple Silicon (llama.cpp + MLX), with a calibrated, machine-truth benchmark. Python ★ 0 [repo]
mobile-mcp-navigation-benchmarkguhcostan Local paired benchmark: Luna vs CLEF-Flash for iOS navigation through Mobile MCP. JavaScript ★ 0 [repo]
system-one-securityankushchadha Rerunnable security experiments on System One decision models (TypeSafe Jev, Cloudflare Clef): state poisoning, prompt injection, truncation, and guard questions. TypeScript ★ 0 [repo]
system1-decision-benchmarkSj0605-DataSci Common-ground benchmark of 50 System-1 decision models (Jev, Clef, Kev, Nimble, Tev1 vs embeddings, rerankers, NLI, prompted LLMs) on 22 datasets. Python ★ 0 [repo]
system1-rerank-benchdchristopoulos Do System 1 decision models work as RAG rerankers? Jev, Clef-flash and Laya vs an LLM and six open rerankers on BEIR, with paired confidence intervals. Python ★ 0 [repo]
08 · Fine-tuning & RL6 entries

Training, fine-tuning, and quantization recipes for Clef weights.

ProjectDescriptionLangStarsLinks
unslothunslothai Local UI and library to run and train LLMs; includes Clef model support and a Clef training benchmark script. Python ★ 77,348 [repo][site]
clef-finetuneMersivMedia Fine-tune Cloudflare's open-source Clef / Clef-flash decision models (LoRA + joint schema head) for vertical decisions like insurance claims and compliance. Python ★ 0 [repo]
clef-finetuningupendrasingh1 Fine-tuning Cloudflare Clef decision models on a 12 GB GPU for real-time entity resolution, with Hugging Face TRL comparisons. Python ★ 0 [repo]
clef-snake-quantizationcameronbergh Less Precision, Better Decisions? An exploratory CLEF-Flash backbone quantization study on Snake. Python ★ 0 [repo]
jev-smolDanielMcSheehy Embedded text+image decision model with a Jev/CLEF System One API, built on SmolVLM2-500M: data pipelines, synthetic generators, LoRA training, eval harness. Python ★ 0 [repo]
stackcraftkkarimi A reproducible Clef-flash fine-tuning study with a playable falling-block game, paired evaluation, and tutorials. Python ★ 0 [repo]
09 · Self-hosting & inference18 entries

Run the open Clef weights on your own hardware.

ProjectDescriptionLangStarsLinks
ollamaollama Run open models locally; includes Clef model support in its runners. Go ★ 182,486 [repo][site]
Rapid-MLXraullenchai OpenAI-compatible inference server for Apple Silicon built on MLX, with System One support for the Clef family. Python ★ 3,929 [repo][site]
simple-jevfeatherless-ai Turn open models into a Jev-style classifier endpoint; includes a Hugging Face server for Clef. Python ★ 591 [repo]
coreai-model-zoojohn-rocky Models and conversion recipes for Apple's Core AI on iPhone and Mac, including a Clef-flash port. Python ★ 455 [repo][site]
vllm-jevmode-io Native vLLM serving for Jev-style decision models, with Clef support and export. Python ★ 326 [repo]
convertggml-org Scripts to convert models to GGUF, with recipes for Clef and Clef-flash. Shell ★ 50 [repo][site]
cleffazknpr Native C11 + Metal inference engine for Cloudflare Clef and Clef-Flash on Apple Silicon (BF16, Jev/SystemOne API). Built after ds4. Python ★ 3 [repo]
open-jevlike-inferArcobalneo Production inference server for open Jev-like decision models (Jev/SystemOne /v1/systemone). Clef-Flash on vLLM: 45 ms p50, 2x throughput, verified against the reference. Python ★ 2 [repo][site]
clef-flashirr Local Jev/System One server for Cloudflare/clef-flash — 9B multimodal decision model, one forward pass per request. Shell ★ 0 [repo]
Clef-flash GGUF GGUF quantizations of Clef-flash from ggml-org for llama.cpp and other local runtimes. — — [link]
clef-flash-apiiwaitu Resident Clef Flash NVFP4 structured decision API with Docker deployment. Python ★ 0 [repo][site]
clef-flash-localturlockmike Run Cloudflare's Clef-Flash decision model locally on a 16 GB GPU: FP8 + compiled, micro-batched /v1/systemone (Jev/SystemOne API) with Ollama pass-through. Python ★ 0 [repo]
clef-flash-snapcanonical Snap package for local inference with Clef-flash. Makefile ★ 0 [repo][site]
clef-flash-vllm-fp8cryguy Cloudflare Clef-Flash on vLLM on one 24 GB GPU: a /v1/systemone server with an FP8 recipe that keeps its Decision Index score. Python ★ 0 [repo]
clef-hrxzacharydenton Local Cloudflare CLEF inference on AMD Strix Halo, written in Rust and Loom. Rust ★ 0 [repo]
clef-lcvBlueFinLab-ai Self-hosted portal and API for Cloudflare's Clef decision models on a single NVIDIA GPU. Python ★ 0 [repo]
jevjamberemaran Self-hosted MCP server and Jev-compatible HTTP API for small decision models (Laya, Julia-1, clef-flash) on one GPU, in Docker. Python ★ 0 [repo]
rverdictsepatel A native Rust decision engine in the "System One" family (Jev, Strands Decider, Von, Laya, Clef). Rust ★ 0 [repo]
10 · Other lists1 entries

Related curated lists.

ProjectDescriptionLangStarsLinks
awesome-decision-modelsAnotiaWang A curated list of decision models (System One / typed decision models): hosted APIs, open-weight models, runtimes, SDKs, applications, benchmarks, and papers. Python ★ 617 [repo][site]
11 · Articles & tutorials5 entries

Write-ups, explainers, and discussion.

ProjectDescriptionLangStarsLinks
Hacker News discussion Hacker News thread on the Clef launch post. — — [link]
A deep dive into Clef, Cloudflare's decision model Flavio Copes walks through what Clef is, how typed questions work, and how to call it. — — [link]
Cloudflare Clef: Jev-compatible, benchmarked and priced Developers Digest summary of Clef's API compatibility, benchmark results, latency, and pricing. — — [link]
Jev vs Clef on a warranty-returns desk Write-up comparing Jev and Clef on the same policy in a Go warranty-returns service (code: warike/warranty-returns). — — [link]
Cloudflare says Clef means humans no longer need to be in the loop The Decoder's news coverage of the Clef launch and Cloudflare's agent claims. — — [link]