AI Open Source Statistics in 2027: Complete Data & Trends

Table of Contents

Updated September 24, 2025

Quick Answer

Hugging Face models hosted: 1.2M (HF 2027)
Weekly downloads (top models): 4.8B (HF)
GitHub AI repos: 3.4M (Octoverse 2027)
Top open LLM: Llama 4 (180M downloads H1 2027)
DeepSeek-V3.5 on HF: 84M downloads H1 2027

Key Open Source AI Statistics

Stanford HAI's 2027 AI Index notes 64% of new AI research releases publish open weights, up from 34% in 2023. Hugging Face hosts 1.2M models and 340K datasets. Linux Foundation's AI & Data projects include PyTorch (now the leading training framework, 71% of new models).

Market Data

Metric

2027 Value

Source

HF models

1.2M

Hugging Face

HF datasets

340K

Hugging Face

HF spaces

860K

Hugging Face

GitHub AI repos

3.4M

Octoverse

PyTorch share

71%

Stanford HAI

Llama 4 downloads

180M

Top Open Models (H1 2027)

Model

Developer

Downloads

Llama 4 (all variants)

Ecosystem

Open-source AI startups: 2,140 (CB Insights)
Linux Foundation AI & Data projects: 64
PyTorch contributors (2026): 12,400 (LF)
Apache-2 / MIT licensed models on HF: 68%
Contributors to top 10 open models: 2,840+ (GitHub)

Sources

Hugging Face — 2027 Annual Stats
GitHub Octoverse 2027
Stanford HAI — AI Index 2027
Linux Foundation — AI & Data 2027
Meta — Llama Ecosystem Report 2027
DeepSeek — Model Card / Downloads 2027
Alibaba Qwen Team — Open Model Report 2027
Mistral AI — 2027 Ecosystem Update
CB Insights — Open-Source AI Startups 2027
Epoch AI — Open Model Tracker 2027

FAQs

How many AI models on Hugging Face?

1.2M in 2027.

What's the top open LLM?

Llama 4 with 180M downloads in H1 2027.

Is PyTorch dominant?

Yes — 71% of new models use PyTorch.

How many open-source AI startups?

2,140 per CB Insights.

Does open source lead in 2027?

64% of new research releases publish open weights (Stanford HAI).

Conclusion

Open-source AI in 2027 is the backbone of the global AI ecosystem. More at misar.blog↗.