Open AI you can actually talk to.

COSMOS.ROCKS runs an open language-model stack — Mistral, Llama and Phi — and lets you chat with it right here, free, no account required. It's also home to Core9, a tiny open-source AI assistant for your desktop.

Try the chat ↓ Get Core9

Talk to the COSMOS stack

Live, right now, running on our own open models. Be kind — it's a small demo instance.

COSMOS LLM connecting…

Hi — I'm COSMO, running on the COSMOS open-model stack. Ask me anything to see it work.

Demo responses are generated live by our models and may be inaccurate. Please don't share personal information.

Powered by open models

No black boxes — these are open-weight models, served from our own infrastructure.

Mistral 7BGeneral reasoning & writing
Llama 3.2 1BFast, lightweight replies
Phi-3 MiniCompact instruction following

Model line-up grows as the project does. If you're an advertiser, our pages are real, human-readable and fully functional — not a doorway page.

Core9 — a small, honest AI assistant

Core9 is a lightweight, open-source desktop assistant. One command, your own API key, a conversation that remembers itself. No accounts, no telemetry, no lock-in.

Runs locally — you bring your own model key (DeepSeek, OpenRouter, or our COSMOS stack)
Remembers your sessions in a local database you own
Pick your own personality — it ships neutral, not branded

Download Core9 Questions?

Properties in the COSMOS network

COSMOS.ROCKS is the hub. Each property below runs its own site — go take a look.

Each property is an independent site. Listing here is a link out, not an endorsement of any product claim.