Source: https://seerepo.com/compare/ace-step/ACE-Step-1.5/vs/hpcaitech/ColossalAI
Markdown source: https://seerepo.com/compare/ace-step/ACE-Step-1.5/vs/hpcaitech/ColossalAI.md
Description: ACE-Step-1.5 and ColossalAI share 17 technologies: FastAPI, uvicorn, Gradio, Rich, matplotlib, accelerate, torchvision, torch, transformers, einops, peft, flash-attn, safetensors, torchaudio, triton, diffusers, and ModelScope. Both are written in Python.

# ACE-Step-1.5 vs ColossalAI

ACE-Step-1.5 and ColossalAI share 17 technologies: FastAPI, uvicorn, Gradio, Rich, matplotlib, accelerate, torchvision, torch, transformers, einops, peft, flash-attn, safetensors, torchaudio, triton, diffusers, and ModelScope. Both are written in Python.

- [ace-step/ACE-Step-1.5](https://seerepo.com/r/ace-step/ACE-Step-1.5): The most powerful local music generation model that outperforms almost all commercial alternatives, supporting Mac, AMD, Intel, and CUDA devices.
- [hpcaitech/ColossalAI](https://seerepo.com/r/hpcaitech/ColossalAI): Making large AI models cheaper, faster and more accessible

## What they share and what sets them apart

- In common: FastAPI, uvicorn, Gradio, Rich, matplotlib, accelerate, torchvision, torch, transformers, einops, peft, flash-attn, safetensors, torchaudio, triton, diffusers, ModelScope
- Only in ACE-Step-1.5: diskcache, Lightning, Textual, triton-windows, mlx, vector-quantize-pytorch, torchao, mlx-lm, torchcodec, loguru
- Only in ColossalAI: chromadb, Hugging Face, anyio, Ray, seaborn, SQLAlchemy, OpenAI, scikit-learn, sentence-transformers, tiktoken, LangChain, datasets, timm, bitsandbytes, vLLM, galore-torch, math-verify, sentencepiece, tokenizers, jinja2, markdown-it-py, markupsafe, mdurl, pypdf, unstructured, pillow, jsonlines, annotated-types, pydantic-core, Pydantic, psutil

## Side by side

| | ACE-Step-1.5 | ColossalAI |
|---|---|---|
| Size | 126,537 lines written, 410 code files | 317,403 lines written, 974 code files |
| Who writes it | 35.8% of its commits signed by AI. With Claude Code, GitHub Copilot, Cursor, Codex, Jules, and CodeRabbit | 0.3% of its commits signed by AI. With Codex and Claude Code |
| Activity | Last push November 8, 2026, 1,104 commits, 14,532 stars | Last push November 6, 2026, 3,887 commits, 41,430 stars |
| Tests | 190 test files. 46.8% of its code files have a test that imports them | 505 test files. 1.1% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, ACE-Step-1.5 or ColossalAI?

ColossalAI, with 317,403 lines written; ACE-Step-1.5 has 126,537.

The proof: [hpcaitech/ColossalAI's code at commit da8f5c2](https://github.com/hpcaitech/ColossalAI/tree/da8f5c2dd56f97d3d23d3d222b114e1a3d4710f5)

### Which has more GitHub stars, ACE-Step-1.5 or ColossalAI?

ColossalAI, with 41,430 stars; ACE-Step-1.5 has 14,532.

The proof: [hpcaitech/ColossalAI on GitHub](https://github.com/hpcaitech/ColossalAI)

### Which has more tests, ACE-Step-1.5 or ColossalAI?

ColossalAI, with 505 test files; ACE-Step-1.5 has 190.

The proof: [hpcaitech/ColossalAI's code at commit da8f5c2](https://github.com/hpcaitech/ColossalAI/tree/da8f5c2dd56f97d3d23d3d222b114e1a3d4710f5)

### Which was updated more recently, ACE-Step-1.5 or ColossalAI?

ACE-Step-1.5: its last push was on November 8, 2026, and ColossalAI's on November 6, 2026.

The proof: [ace-step/ACE-Step-1.5's commits on GitHub](https://github.com/ace-step/ACE-Step-1.5/commits)

### Which has more commits signed by AI, ACE-Step-1.5 or ColossalAI?

ACE-Step-1.5: an AI signed 35.8% of its commits, with Claude Code, GitHub Copilot, Cursor, Codex, Jules, and CodeRabbit; in ColossalAI, 0.3%.

The proof: [the commits each tool signed in ace-step/ACE-Step-1.5](https://seerepo.com/r/ace-step/ACE-Step-1.5/ai)

## Sources

- ace-step/ACE-Step-1.5: Read on November 9, 2026, at commit ca1e85f (https://github.com/ace-step/ACE-Step-1.5/tree/ca1e85fe9430179831e6bc6be790c332190a3866)
- hpcaitech/ColossalAI: Read on November 6, 2026, at commit da8f5c2 (https://github.com/hpcaitech/ColossalAI/tree/da8f5c2dd56f97d3d23d3d222b114e1a3d4710f5)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.