v1.0 · Windows · Free & Open

Your AI.
No cloud.
No limits.

ClosedAI runs powerful language models entirely on your machine.
No API keys. No subscriptions. No data leaving your device.

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Windows 10/11 · 64-bit · Requires Ollama
CLOSEDAI · llama3.2
+ New chat
What is entropy?
Write a Python script
Explain black holes
model: llama3.2
Explain quantum entanglement simply.
AI
Quantum entanglement is when two particles become linked — measuring one instantly affects the other, no matter the distance.
Can it be used for communication?
AI
Not for faster-than-light communication — the results are random until you compare notes classically…
Ask anything…

Built for privacy.
Built to run anywhere.

🔒
100% Offline

Every conversation stays on your machine. No telemetry, no cloud, no logging. Your data is yours.

Instant Setup

Install, pick a model, and start chatting. ClosedAI handles Ollama automatically — no terminal needed.

🧠
Multiple Models

Download and switch between Llama, Mistral, DeepSeek, Qwen, and more — all from inside the app.

💬
Chat History

All your conversations are saved locally. Pick up right where you left off, any time.

Clean Interface

A minimal dark UI that stays out of your way. Code highlighting, markdown rendering, one-click copy.

🆓
Completely Free

No subscriptions, no usage limits, no API costs. Download once, use forever.

Choose your
intelligence.

Llama 3.2
Meta·2.0 GB·Fast

Best general-purpose model for low RAM. Great for everyday tasks.

Recommended
Phi 3.5
Microsoft·2.2 GB·Fast

Excellent at coding and everyday tasks. Punches above its weight.

Mistral 7B
Mistral AI·4.1 GB·Fast

Balanced speed and quality. The classic all-rounder.

DeepSeek R1 8B
DeepSeek·4.9 GB·Medium

Strong reasoning. Best choice for complex, multi-step problems.

Best reasoning
Qwen 2.5 7B
Alibaba·4.4 GB·Medium

Strong multilingual and coding support.

Llama 3.1 70B
Meta·40 GB·Slow

Frontier-level quality. Requires high-end hardware.

Most powerful

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Download for Windows
Windows 10 / 11 · 64-bit macOS — coming soon Linux — coming soon