H3.c

H3.c is an inference engine for running MiniMax-H3 prompt-to-video and audio generation natively on Apple Silicon with Metal.

H3.c is a native MiniMax-H3 inference engine designed for Apple Silicon Macs using Metal. It provides end-to-end prompt-to-video and prompt-to-audio generation, supporting first-frame and last-frame conditioning as well as ordered Ref2VA image, video, and audio references. Users can interact with the engine via a CLI or an interactive session that caches prompt conditioning and model weights in memory. It includes features like SSD streaming to reduce DiT memory usage and graphical terminal previews for monitoring denoising passes.

H3.c at a glance

Best for: Software engineer, Researcher
Runs on: macOS, CLI
Pricing: Free
Released: August 2026
Category: AI video tool
Website: github.com/antirez/h3.c

Key features

Generate video and audio directly from text prompts
Condition generation using first and last frame anchors
Support ordered Ref2VA image, video, and audio references
Stream DiT weights from SSD to reduce memory footprint
Display live denoising previews in supported graphical terminals
Run interactive sessions with cached prompt conditioning
Adjust denoising steps, layer counts, and velocity reuse
Inspect model layout and Metal devices with CLI flags

Use it for

Generating short video and audio clips locally from text prompts
Creating video transitions between first and last anchor frames
Conditioning AI video generation on reference images
Previewing frame denoising progress inside terminal emulators

Alternatives to H3.c

FreeVideo — Runs MiniMax H3 locally on consumer GPUs with as little as 8 GB of VRAM.
FastVideo — Provides end-to-end post-training and real-time inference for accelerated video generation.
Wan — Provides native 30-second video generation and pixel-perfect consistency.
TurboDiffusion — Accelerates video diffusion generation by up to 200 times on single GPUs.
SolarRenderer — Renders game engine and agent structures into finished video in four steps.
ATAS — Maintains persistent spatial and event memory across shots.
OneStreamer — It jointly learns to record evidence and respond through proactive generation.
TalkLikeYou Streaming RealTime Demo — Generates 30+ FPS real-time talking-head video with low VRAM usage.
Claude Real Video — Analyzes videos locally to make visual content readable by any LLM.
Motionmaxxing — It replaces default AI templates with measured motion based on professional design rules.
MAGI-1 — Generates synchronized audio and visuals with high-fidelity camera control.
Jianying Headless — Automates video editing and native engine exports for Jianying Professional.

All H3.c alternatives