Work on physics with an AI that runs on your computer
Pose a question, and your AI lab partner reasons it through, writes real Python with the ZeptoPhysics formulas, runs it in your browser, and records every step in a notebook you own. Share good notebooks with the community so others can check and build on them.
Enter to send, Shift+Enter for a new line. AI output can be wrong, especially from small local models. Check numbers against the code it runs.
Community library
Notebooks shared by ZeptoPhysics CoLab users. Reviewed notebooks have been checked by an editor; others are community work in progress.
Encrypted rooms end-to-end
Private spaces for researchers and industry teams to talk and swap notebooks. Messages are encrypted in your browser with AES-256-GCM before they leave it; ZeptoPhysics stores only ciphertext and cannot read them. The key lives only in the invite link.
Anyone with an invite link and an ORCID iD can join, so share links only with people you trust, through a channel you trust. Don't share classified, export-controlled or confidential third-party material here: encryption does not make sharing it lawful. Rooms aren't moderated by our editors because we can't read them.
Choose a room, or create one and send its invite link to collaborators.
Your AI, your computer
"In my browser" downloads an open model (Qwen3 or Phi, Apache-2.0/MIT licensed) from Hugging Face the first time and runs it on your graphics chip through WebGPU. After that it works offline, and nothing you type leaves your device. Larger models are smarter but need more memory.
Prefer your own setup? Point ZeptoPhysics CoLab at Ollama or LM Studio on your desktop, or use your own cloud API key. Requests go directly from your browser to that server.
It computes instead of guessing
Small models are poor at arithmetic, so the AI is told to write Python for every number. The Python runs in your browser (Pyodide) with the same formulas as the ZeptoPhysics calculators, and the output goes back to the AI to interpret. You can read and rerun every cell.
From notebook to shared knowledge
Share a notebook and it joins the community library under CC BY 4.0, with its full trace. Others can mark it as checked, report problems, or discuss it. Discussion is open to researchers who sign in with their ORCID iD, so every comment carries a verified identity. An editor reviews notebooks before it is labelled Reviewed. Nothing counts as established just because an AI said it.
Open science: cite it, download it, reuse it
Every shared notebook has a permanent page with citation metadata, and its author can archive it on Zenodo (CERN) to get a DOI linked to their ORCID iD. The whole library and the benchmark results are open data: notebooks under CC BY 4.0, benchmark scores under CC0. The formulas in zepto.py are MIT licensed.
Power users: the desktop workspace
Run a full research agent on your own machine. The ZeptoPhysics CoLab workspace pack adds the ZeptoPhysics formulas, skills and project templates to OpenScience, Hermes Agent or any agent that reads AGENTS.md and SKILL.md files.
Download workspace pack zepto.py (formulas only)