# ACE-Step 1.5

> ACE-Step 1.5 (co-led by ACE Studio and StepFun) pairs a language-model planner with a diffusion decoder to make songs from 10 seconds to 10 minutes, with lyrics in 50+ languages. It runs as a Gradio UI, REST API or CLI, and the 2B model fits in under 4 GB of VRAM; the 4B XL models need 12 GB or more. Code and weights are MIT. Covers, repaint and stem extraction exist, but extraction needs the base models. The YuE2 team's benchmark scores it below Suno v5, and a source install needs Python 3.11-3.12 unless you use the portable packages.

- Repository: https://github.com/ace-step/ACE-Step-1.5
- Official docs: https://github.com/ace-step/ACE-Step-1.5#readme
- Checked: 2026-10-15

## What it replaces
- Suno: Full songs with vocals from a prompt or lyrics, Instrumental tracks (Instrumental mode), Covers and restyles of an uploaded song (Cover), Extending or regenerating part of a song (Extend, Splitting a song into vocal and instrument stems (Get Stems) (partial). Covers all five jobs locally; stem extraction only with the base models. Output quality was not tested here.

## Facts, with sources

| Question | Status | Answer | Source | Checked |
|---|---|---|---|---|
| Runs on my machine? | Confirmed | Yes, Gradio UI, REST API or CLI on your own machine | https://github.com/ace-step/ACE-Step-1.5#-abstract | 2026-10-15 |
| Code licence | Confirmed | MIT | https://github.com/ace-step/ACE-Step-1.5#readme | 2026-10-15 |
| Model weights licence | Confirmed | MIT (ACE-Step 1.5 and XL weights on Hugging Face) | https://huggingface.co/ACE-Step/Ace-Step1.5 | 2026-10-15 |
| Commercial use | Confirmed | Yes, MIT code and weights; the authors ask you to check outputs for copyright problems | https://github.com/ace-step/ACE-Step-1.5#-license--disclaimer | 2026-10-15 |
| Paid services needed? | Confirmed | None required; a free hosted version (acemusic.ai) is optional | https://github.com/ace-step/ACE-Step-1.5#-quick-start | 2026-10-15 |
| Hardware | Confirmed | Under 4 GB VRAM for the 2B model without the planner; XL needs 12 GB+ with offload or 20 GB+ without; CUDA, ROCm, Intel XPU, Apple MPS or CPU | https://github.com/ace-step/ACE-Step-1.5#-which-model-should-i-choose | 2026-10-15 |
| Operating systems | Confirmed | Windows (CUDA or ROCm), Linux and macOS (Apple Silicon) launch scripts | https://github.com/ace-step/ACE-Step-1.5#-launch-scripts | 2026-10-15 |
| Setup effort | Confirmed | Easy; portable packages for Windows and macOS, or uv sync then uv run acestep | https://github.com/ace-step/ACE-Step-1.5/blob/main/docs/en/INSTALL.md | 2026-10-15 |

GitHub: 13647 stars, 1790 forks, last push 2026-10-11, archived: no.
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Source: RepoQuarry (https://repoquarry.dev/projects/ace-step-1-5). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.