Democratizing Intelligence on Consumer Hardware.

Welcome to Nexus 3B Labs, an open collective dedicated to pushing the boundaries of what's possible with Small Language Models (SLMs). We believe that powerful AI shouldn't require a data center—it should run efficiently on the laptop in front of you.

To build accessible, privacy-first, and highly capable AI tooling that empowers developers to Run, Train, and Reason with local models completely offline.

We specialize in the 3B-7B parameter sweet spot—models small enough to run on personal devices but smart enough to do real work.

• Local-First Architecture: No API keys, no cloud dependency, no data leaks.
• Apple Silicon Optimization: Deep integration with Metal (MPS) for MacBook users.
• Human-in-the-Loop: Tools that help humans steer and understand AI, not just consume output.

The ultimate research station for local AI.

• Chat: A polished interface for interacting with local models.
• Train: One-click LoRA Fine-Tuning to build custom personas.
• Reason: Visual "Thinking Process" engine to debugging chain-of-thought.

⚠️ Compatibility Note Currently, our tools are Battle-Tested on Mac (Apple Silicon). Support for Windows and Linux is currently experimental and under active development.

We are looking for contributors who love:

• Python & Rust
• React & Modern UI
• Model Optimization (Quantization/Pruning)

Let's build the local AI future together.