Hunyuan 3 (Hy3)
1 MLX alias · Tencent Hunyuan 3 · 295B MoE · preview · M3-Ultra-class (256 GB+) · hy_v3 tool + reasoning parser.
Hunyuan 3 (Hy3) is Tencent's 295B mixture-of-experts flagship, shipped in MLX form as a preview. It uses a dedicated hy_v3 tool-call parser and hy_v3 reasoning parser, and honors a reasoning_effort override on /v1/responses and /v1/chat/completions. This is an Ultra-class model — the weights want an M3 Ultra with 256 GB+ of unified memory, so it is not something a 32 or 64 GB Mac can hold.
Not R2-mirrored. Hy3 is not on the models.rapidmlx.com RAM picker or the R2 catalog — it pulls from Hugging Face on first use via its alias. Run rapid-mlx pull hy3-preview-4bit (or just serve) and the weights stream from mlx-community/Hy3-preview-4bit.
- family
- Hunyuan
- aliases
- 1
- status
- preview
- min RAM
- 256 GB (M3 Ultra-class)
- install
- rapid-mlx serve <alias>
- OpenAI base URL
- http://localhost:8000/v1
Download
Every alias on this page downloads with one command — the pull buttons in the tables below copy it. These checkpoints pull from Hugging Face directly (not mirrored on our CDN). Weights land in the standard Hugging Face cache, and rapid-mlx serve pulls automatically on first use. Live mirror status →
Hunyuan 3 295B · 1 alias · preview
295B MoE in 4-bit MLX. Dedicated hy_v3 tool-call parser and reasoning parser, with a reasoning_effort override. Ultra-class: plan for 256 GB+ of unified memory.
tool parser: hy_v3 · reasoning parser: hy_v3
| alias | hf repo | tool parser | reasoning | flags | get it |
|---|---|---|---|---|---|
| hy3-preview-4bit | mlx-community/Hy3-preview-4bit | hy_v3 | hy_v3 | moe · preview · 256 GB · no-spec | HF |
Pull & serve
| rapid-mlx pull hy3-preview-4bit |
| rapid-mlx serve hy3-preview-4bit |
Notes & caveats
- Preview. Hy3 ships as a preview alias — expect the alias name and defaults to firm up as the family matures.
- Ultra-only. The 295B MoE weights need ~256 GB of unified memory; this is an M3 Ultra-class model, not a laptop model.
- Not R2-mirrored. Weights pull from Hugging Face (
mlx-community/Hy3-preview-4bit), not the R2 mirror, so first run downloads from HF. - Reasoning streams via the
hy_v3reasoning parser intoreasoning_content; passreasoning_effortto tune depth. - Speculative decoding is not supported for this alias.