Open source large-language-models projects

Every project in the registry tagged large-language-models, ranked by real GitHub adoption.

projects 20 combined stars ★ 376K refresh nightly
01 Langflow ★ 156K

Visual builder for AI agents and RAG pipelines

last push9 hours ago languagePython licenseMIT
02 LightRAG ★ 40K

[EMNLP2025] LightRAG: Simple and Fast Retrieval-Augmented Generation

last push4 days ago languagePython licenseMIT
03 Langfuse ★ 37K

Open source LLM engineering platform for AI-powered applications

last push7 hours ago languageTypeScript license—
04 agentscope ★ 35K

Build and run agents you can see, understand and trust.

last push14 hours ago languagePython licenseApache-2.0
05 haystack ★ 27K

Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with exp

last push10 hours ago languagePython licenseApache-2.0
06 PentestGPT ★ 16K

Automated Penetration Testing Agentic Framework Powered by Large Language Models

last push4 months ago languagePython licenseMIT
07 txtai ★ 13K

💡 All-in-one AI framework for semantic search, LLM orchestration and language model workflows

last push36 hours ago languagePython licenseApache-2.0
08 Activeloop ★ 9.3K

The tensor database for AI data

last push6 months ago languageC++ licenseApache-2.0
09 R2R ★ 8.1K

SoTA production-ready AI retrieval system. Agentic Retrieval-Augmented Generation (RAG) with a RESTful API.

last push12 months ago languagePython licenseMIT
10 Helicone ★ 6.3K

Build reliable AI apps with comprehensive observability

last push5 days ago languageTypeScript licenseApache-2.0
11 Observal ★ 4.5K

Observal is self-hosted registry for your coding agent extensions with a built in insight engine. Setup Observal, define the scope and share your Skills, MCPs

last push17 hours ago languagePython licenseApache-2.0
12 ruby_llm ★ 4.5K

The Ruby-native AI framework. Chats, agents, tools, images, audio, and video through one consistent API, in plain Ruby or Rails.

last push7 hours ago languageRuby licenseMIT
13 optillm ★ 4.3K

Optimizing inference proxy for LLMs

last push21 hours ago languagePython licenseApache-2.0
14 GenerativeAIExamples ★ 4.2K

Generative AI reference workflows optimized for accelerated infrastructure and microservice architecture.

last push2 months ago languageJupyter Notebook licenseApache-2.0
15 Swirl Search ★ 3.1K

Get instant answers from your company knowledge

last push6 days ago languagePython licenseApache-2.0
16 ChainForge ★ 3.0K

An open-source visual programming environment for battle-testing prompts to LLMs.

last push4 days ago languageTypeScript licenseMIT
17 Beam ★ 1.8K

Serverless GPU compute with sub-second cold starts

last push7 hours ago languageGo licenseAGPL-3.0
18 ServerlessLLM ★ 718

Serverless LLM Serving for Everyone.

last push2 months ago languagePython licenseApache-2.0
19 embedJs ★ 601

A NodeJS RAG framework to easily work with LLMs and embeddings

last push4 months ago languageTypeScript licenseApache-2.0
20 langtest ★ 561

Deliver safe & effective language models

last push2 months ago languagePython licenseApache-2.0

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Frequently asked questions

How many open source large-language-models projects are there?

This registry tracks 20 projects tagged large-language-models, with 376,065 GitHub stars between them. The most-adopted is Langflow at 156,266 stars.

Are these large-language-models projects free to use?

Yes — 19 of the 20 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.

Which large-language-models project should I choose?

The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.

Are these large-language-models projects still maintained?

16 of the 20 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.