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litgpt vs vllm

litgpt and vllm share 4 technologies: safetensors, torch, tokenizers, and psutil. Both are written in Python.

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What they share and what sets them apart

Lightning-AI

litgpt

20+ high-performance LLMs with recipes to pretrain, finetune and deploy at scale.

Python13.7kRead on November 9, 2026, at commit 4738993What is litgpt built with?

Only in litgpt

In common

vllm-project

vllm

A high-throughput and memory-efficient inference and serving engine for LLMs

Python96.8kRead on November 12, 2026, at commit c6573eeWhat is vllm built with?

Only in vllm

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
litgpt33,622 lines written64 code files
vllm2,489,750 lines written3,450 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.
litgpt0.3% of its commits signed by AIWith Claude Code and GitHub Copilot
vllm14% of its commits signed by AIWith Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot, Devin, Mistral Vibe, CodeRabbit, Factory, and Qwen Code
ActivityFrom GitHub and its history, on the day SeeRepo read it.
litgptLast push November 1, 20261,499 commits13,746 stars
vllmLast push November 12, 202625,200 commits96,790 stars
TestsThe files that test the code, and the share of code files a test imports.
litgpt57 test files57.8% of its code files have a test that imports them
vllm2,521 test files61.1% of its code files have a test that imports them

Frequently asked questions

Which is bigger, litgpt or vllm?
vllm, with 2,489,750 lines written; litgpt has 33,622.

The proof: vllm-project/vllm's code at commit c6573ee

Which has more GitHub stars, litgpt or vllm?
vllm, with 96,790 stars; litgpt has 13,746.

The proof: vllm-project/vllm on GitHub

Which has more tests, litgpt or vllm?
vllm, with 2,521 test files; litgpt has 57.

The proof: vllm-project/vllm's code at commit c6573ee

Which was updated more recently, litgpt or vllm?
vllm: its last push was on November 12, 2026, and litgpt's on November 1, 2026.

The proof: vllm-project/vllm's commits on GitHub

Which has more commits signed by AI, litgpt or vllm?
vllm: an AI signed 14% of its commits, with Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot, Devin, Mistral Vibe, CodeRabbit, Factory, and Qwen Code; in litgpt, 0.3%.

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

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