MiniMax H3 (Hailuo 3)

H3 generates video and synchronised stereo audio jointly, from text, images, reference video, reference audio, or any mix. It is the same model family whether you hit the hosted API or run the open weights, but the two paths are wired completely differently and only one of them is free.

Two paths, do not confuse them.

• Hosted API, partner nodes MinimaxHailuo03TextToVideoNode / ...FirstLastFrameNode / ...ReferenceNode, category partner/video/MiniMax. 2K output, priced per second, no local weights.
• Local open weights, core nodes MiniMaxH3ImageToVideo and MiniMaxH3ReferenceToVideo from comfy_extras/nodes_minimax_h3.py. 768p, free, and everything below is about this path.

Who owns what, so you open one file, not three. THIS file owns the prompt format and the operating rules. reference.md next to it owns weights, quant sizes, acceleration packs and their wiring. The MiniMax entry in the kit's MODELS.md owns the node-level graph (every node and socket) and the licence. When they disagree, the node code wins and the discrepancy is a bug worth reporting.

The prompt format is not free-form prose