{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/ace-step-1-5/","md":"https://postcutoff.com/m/ace-step-1-5/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"ace-step-1-5","name":"ACE-Step 1.5 (incl. 1.5 XL)","org":"ACE Studio & StepFun","family":"ACE-Step","released":"2026-01-28","status":"current","type":"music","modality_in":["text","audio"],"modality_out":["audio"],"open_weights":true,"model_license":"mit","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":null,"price_line":"Price not published","access":[{"provider":"Hugging Face","url":"https://huggingface.co/ACE-Step/Ace-Step1.5"},{"provider":"Hugging Face (XL 4B DiT)","url":"https://huggingface.co/ACE-Step/acestep-v15-xl-sft"},{"provider":"GitHub","url":"https://github.com/ace-step/ACE-Step-1.5"},{"provider":"Web app","url":"https://acemusic.ai"}],"capabilities":[{"name":"Full songs in seconds on consumer hardware","detail":"10 s to 10 min of music; under 2 s per song on an A100 and under 10 s on an RTX 3090; standard models run in <4 GB VRAM with offload (XL: >=12 GB, 20 GB recommended).","first":false,"discovered":"launch","source":"https://github.com/ace-step/ACE-Step-1.5"},{"name":"LM planner + DiT synthesizer","detail":"A language model (0.6B/1.7B/4B '5Hz LM') turns prompts into a song blueprint that a Diffusion Transformer renders; aligned with 'intrinsic' RL without external reward models.","first":false,"discovered":"launch","source":"https://arxiv.org/abs/2602.00744"},{"name":"Editing and personalization toolkit","detail":"Cover generation, repaint/editing, vocal-to-BGM, track separation, multi-track generation, BPM/key extraction and LoRA fine-tuning from ~8 songs (about 1 h on a 12 GB RTX 3090); lyrics in 50+ languages.","first":false,"discovered":"launch","source":"https://github.com/ace-step/ACE-Step-1.5"}],"entry":"2026-01-28-ace-step-1-5","notes":"Checkpoints: acestep-v15-base / -sft / -turbo (plus turbo-shift variants) and, from 2026-04-02, XL (4B DiT) xl-base / xl-sft / xl-turbo; diffusers versions added Apr-Jun 2026. Release date 2026-01-28 is from secondary sources (HF repos created 2026-01-23, arXiv 2602.00744 submitted 2026-01-31). Authors claim quality beyond most commercial models (SongEval above Suno v5 per secondary coverage; not independently verified). Supports Mac, AMD, Intel and CUDA.","verified":"2026-09-29","body_md":"The go-to MIT-licensed local song generator in 2026. Quick start: clone https://github.com/ace-step/ACE-Step-1.5 and follow the README (Gradio UI and API server included).\n\nSources: [GitHub](https://github.com/ace-step/ACE-Step-1.5), [HF](https://huggingface.co/ACE-Step/Ace-Step1.5), [tech report](https://arxiv.org/abs/2602.00744), [project page](https://ace-step.github.io/ace-step-v1.5.github.io/).","page_url":"https://postcutoff.com/m/ace-step-1-5/","standing":{"kind":"music generation","newer_count":9,"newer":[{"id":"elevenlabs-music-v2-5","name":"Eleven Music v2.5","org":"ElevenLabs","released":"2026-09-11","page_url":"https://postcutoff.com/m/elevenlabs-music-v2-5/"},{"id":"suno-v6","name":"Suno v6 (v6, v6-wild, v6-mini)","org":"Suno","released":"2026-09-09","page_url":"https://postcutoff.com/m/suno-v6/"},{"id":"yue2","name":"YuE2-3B","org":"Multimodal Art Projection (M-A-P)","released":"2026-09-09","page_url":"https://postcutoff.com/m/yue2/"},{"id":"lyria-3-5","name":"Lyria 3.5","org":"Google DeepMind","released":"2026-07-29","page_url":"https://postcutoff.com/m/lyria-3-5/"},{"id":"minimax-music-3","name":"MiniMax Music 3.0","org":"MiniMax","released":"2026-07-16","page_url":"https://postcutoff.com/m/minimax-music-3/"}],"before":null,"after":null,"weights":"public","licence":"mit","licence_permissive":true,"summary":"Weights are public under a permissive licence (MIT)."}}