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ColossalAI vs llama_index

ColossalAI and llama_index share 29 technologies: chromadb, anyio, Ray, matplotlib, Rich, SQLAlchemy, ModelScope, OpenAI, scikit-learn, sentence-transformers, tiktoken, torch, transformers, LangChain, peft, datasets, vLLM, einops, sentencepiece, tokenizers, jinja2, markupsafe, pypdf, unstructured, pillow, 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

run-llama

llama_index

LlamaIndex is the document processing platform for AI

Python52.8kRead on November 5, 2026, at commit 444fdf0What is llama_index built with?

Only in llama_index

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
ColossalAI317,403 lines written974 code files
llama_index473,236 lines written2,055 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
llama_index0.2% of its commits signed by AIWith Claude Code, Cursor, and GitHub Copilot
ActivityFrom GitHub and its history, on the day SeeRepo read it.
ColossalAILast push November 6, 20263,887 commits41,430 stars
llama_indexLast push November 5, 20267,963 commits52,820 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
llama_index1,607 test files46.5% of its code files have a test that imports them

Frequently asked questions

Which is bigger, ColossalAI or llama_index?
llama_index, with 473,236 lines written; ColossalAI has 317,403.

The proof: run-llama/llama_index's code at commit 444fdf0

Which has more GitHub stars, ColossalAI or llama_index?
llama_index, with 52,820 stars; ColossalAI has 41,430.

The proof: run-llama/llama_index on GitHub

Which has more tests, ColossalAI or llama_index?
llama_index, with 1,607 test files; ColossalAI has 505.

The proof: run-llama/llama_index's code at commit 444fdf0

Which was updated more recently, ColossalAI or llama_index?
ColossalAI: its last push was on November 6, 2026, and llama_index's on November 5, 2026.

The proof: hpcaitech/ColossalAI's commits on GitHub

Which has more commits signed by AI, ColossalAI or llama_index?
ColossalAI: an AI signed 0.3% of its commits, with Codex and Claude Code; in llama_index, 0.2%.

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