Comparison
Claude Opus 5.5 vs Cloudflare Clef
People have published 201 builds with Claude Opus 5.5 and 126 with Cloudflare Clef, overlapping in 8 use cases. Claude Opus 5.5 has more games examples; Cloudflare Clef has more education, agents.
First model in Anthropic's Claude 5.5 family. Positioned for agentic coding, knowledge work and long tasks; priced at $4/$20 per million input/output tokens, about 30% faster output than Opus 5, and top scores on Anthropic's behavioral alignment audit.
- 201
- Entries
- 186
- Creators
- X, Reddit, GitHub
- Top source
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
Same use case, side by side
Top builds with Claude Opus 5.5
- 1Warehouse management software styled like a strategy gameon X:Dilum Sanjaya· 24.4K likes
- 2"I'm Upping My P(doom)" music video, full sourceon GitHub:John Heibel· 1.9K stars
- 3Awesome Opus 5.5 Videos (prompt gallery)on GitHub:yihui-dev· 1.5K stars
- 4Opus 5.5 motion-designer showreel from one Max-effort prompton X:Stephan Livera· 17.1K likes
- 512-hour overnight run: Opus 5.5 plus Midjourney and a moodboardon X:anabology· 15.9K likes
Top builds with Cloudflare Clef
- 1Cloudflare Just Challenged Jev, So I Tested Their New Model (Clef)on YouTube:Better Stack· 64K views
- 2Say Hi to Clef. Better Open Source Jevon YouTube:CoderOne· 19.6K views
- 3Clef: Open-source decision models, and new RL fine-tuning platformon YouTube:Signal Coders· 17.3K views
- 4Cloudflare Clef: Free Open Source AI Decisions in 38mson YouTube:Prism Labs· 13.9K views
- 5Cloudflare Clef : The #1 Open Source Alternative to Jev Is Hereon YouTube:Codedigipt· 10K views
