Ritn3D
Turn any floor plan into an interactive 3D model with AI
What it does
Ritn3D converts 2D floor plans into interactive 3D interior models — automatically. Upload a PDF, JPG, or PNG of any floor plan. AI detects walls, doors, and windows, then generates a full 3D walkthrough model in under two minutes. No CAD skills. No 3D software. What you get: - Interactive 3D viewer with orbit and walk-through modes - Shareable 3D links for clients and collaborators - STL export for 3D printing physical scale models (1:50 to 1:500) - GLB download for use in any 3D tool
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I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
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Hey HN, Henry from Cactus here! We previously released Cactus Needle, a 14MB agentic LLM for tool call, device use, and structured extraction for phones, wearables, smart homes, small robots and microcontrollers. We got really great feedback here, and have now incorporated the suggestions to release Needle 2. The whole model is a single 14MB binary that runs a full session in 28MB of RAM; 45m parameters at 2bit compression. Needle hits 500 tokens/sec decode speed on a Raspberry Pi 5, sits between 400-1,500 tokens/sec on VR devices like Meta Quest 3S and Apple Vision Pro, and ranges…
AI · 27d ago · cactuscompute.com
Launched alongside, March 2026
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Switch from ChatGPT to Claude with import memory feature
AI · Mar 2026 · claude.com
