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ColossalAI vs ray

ColossalAI and ray share 37 technologies: FastAPI, uvicorn, Hugging Face, anyio, Ray, Gradio, matplotlib, Rich, SQLAlchemy, scikit-learn, tiktoken, torch, transformers, LangChain, triton, peft, diffusers, datasets, timm, safetensors, bitsandbytes, einops, accelerate, sentencepiece, tokenizers, torchaudio, torchvision, jinja2, markdown-it-py, markupsafe, mdurl, pillow, jsonlines, annotated-types, pydantic-core, Pydantic, and psutil. Both are written in Python.

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What they share and what sets them apart

hpcaitech

ColossalAI

Making large AI models cheaper, faster and more accessible

Python41.4kRead on November 6, 2026, at commit da8f5c2What is ColossalAI built with?

Only in ColossalAI

In common

ray-project

ray

Ray is an AI compute engine. Ray consists of a core distributed runtime and a set of AI Libraries for accelerating ML workloads.

Python44.2kRead on November 6, 2026, at commit 77567c5What is ray built with?

Only in ray

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
ColossalAI317,403 lines written974 code files
ray1,531,664 lines written2,777 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
ColossalAI0.3% of its commits signed by AIWith Codex and Claude Code
ray3.6% of its commits signed by AIWith Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex
ActivityFrom GitHub and its history, on the day SeeRepo read it.
ColossalAILast push November 6, 20263,887 commits41,430 stars
rayLast push November 6, 202632,373 commits44,213 stars
TestsThe files that test the code, and the share of code files a test imports.
ColossalAI505 test files1.1% of its code files have a test that imports them
ray2,168 test files9.7% of its code files have a test that imports them

Frequently asked questions

Which is bigger, ColossalAI or ray?
ray, with 1,531,664 lines written; ColossalAI has 317,403.

The proof: ray-project/ray's code at commit 77567c5

Which has more GitHub stars, ColossalAI or ray?
ray, with 44,213 stars; ColossalAI has 41,430.

The proof: ray-project/ray on GitHub

Which has more tests, ColossalAI or ray?
ray, with 2,168 test files; ColossalAI has 505.

The proof: ray-project/ray's code at commit 77567c5

Which was updated more recently, ColossalAI or ray?
Both got their last push on November 6, 2026.

The proof: hpcaitech/ColossalAI's commits on GitHub

Which has more commits signed by AI, ColossalAI or ray?
ray: an AI signed 3.6% of its commits, with Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex; in ColossalAI, 0.3%.

The proof: the commits each tool signed in ray-project/ray

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