Native MiniMax-H3 inference for Apple Silicon

H3-metal

antirez (Salvatore Sanfilippo)

2025

What is H3-metal?

01

Native C Implementation Lightweight, high-performance inference engine written in pure C
02

Apple Silicon Optimized Built specifically to leverage Metal GPU acceleration on M-series chips
03

MiniMax-H3 Model Runs the MiniMax-H3 large language model locally on your Mac
04

Open Source Available on GitHub for community use and contribution

03

Technical Excellence

Why H3-metal stands out

Core Advantages

speed

Native Performance

Direct Metal API integration for maximum GPU utilization

memory

Memory Efficient

Optimized memory management for large model inference

terminal

Lightweight

Minimal dependencies, clean C implementation

lock

Privacy First

All inference runs locally on your device

243

Hacker News Points

Strong community interest in native Apple Silicon AI inference

06

How It Works

The inference pipeline

Inference Pipeline

1

Model Loading

MiniMax-H3 weights loaded into unified memory

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2

Metal Compilation

GPU kernels compiled for Apple Silicon architecture

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3

Token Processing

Input tokens processed through transformer layers

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4

GPU Acceleration

Parallel computation on Metal-capable GPU

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5

Output Generation

Tokens decoded and streamed to user

Thank You

Explore H3-metal on GitHub

github.com/antirez/h3.c