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pytorch-lightning vs LocalAI

pytorch-lightning and LocalAI share 4 technologies: FastAPI, torch, Lightning, and jinja2. pytorch-lightning is written in Python and LocalAI in Go.

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What they share and what sets them apart

Lightning-AI

pytorch-lightning

Pretrain, finetune ANY AI model of ANY size on 1 or 10,000+ GPUs with zero code changes.

Python31.4kRead on November 7, 2026, at commit 84df182What is pytorch-lightning built with?

Only in pytorch-lightning

In common

mudler

LocalAI

LocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.

Go50.2kRead on November 5, 2026, at commit efc6f93What is LocalAI built with?

Only in LocalAI

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
pytorch-lightning138,949 lines written271 code files
LocalAI1,389,292 lines written2,979 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.
pytorch-lightning0.1% of its commits signed by AIWith GitHub Copilot and Claude Code
LocalAI3.7% of its commits signed by AIWith Claude Code, GitHub Copilot, and Cursor
ActivityFrom GitHub and its history, on the day SeeRepo read it.
pytorch-lightningLast push October 30, 202611,034 commits31,446 stars
LocalAILast push November 5, 20269,317 commits50,214 stars
TestsThe files that test the code, and the share of code files a test imports.
pytorch-lightning329 test files66.1% of its code files have a test that imports them
LocalAI2,911 test files60.8% of its code files have a test that imports them

Frequently asked questions

Which is bigger, pytorch-lightning or LocalAI?
LocalAI, with 1,389,292 lines written; pytorch-lightning has 138,949.

The proof: mudler/LocalAI's code at commit efc6f93

Which has more GitHub stars, pytorch-lightning or LocalAI?
LocalAI, with 50,214 stars; pytorch-lightning has 31,446.

The proof: mudler/LocalAI on GitHub

Which has more tests, pytorch-lightning or LocalAI?
LocalAI, with 2,911 test files; pytorch-lightning has 329.

The proof: mudler/LocalAI's code at commit efc6f93

Which was updated more recently, pytorch-lightning or LocalAI?
LocalAI: its last push was on November 5, 2026, and pytorch-lightning's on October 30, 2026.

The proof: mudler/LocalAI's commits on GitHub

Which has more commits signed by AI, pytorch-lightning or LocalAI?
LocalAI: an AI signed 3.7% of its commits, with Claude Code, GitHub Copilot, and Cursor; in pytorch-lightning, 0.1%.

The proof: the commits each tool signed in mudler/LocalAI

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