head to head · open source
GPT4All vs langtest
GPT4All has 77,347 GitHub stars, 8,261 forks, 771 open issues and last shipped 1.4 years ago. langtest has 561 stars, 53 forks, 6 open issues and last shipped 2 months ago. GPT4All leads on adoption by 13,687% (77,347 vs 561 stars). GPT4All is written in C++ under MIT; langtest is written in Python under Apache-2.0. GPT4All has attracted 11% as many forks as stars, langtest 9%. langtest was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| GPT4All | langtest | |
|---|---|---|
| GitHub stars | ★ 77K | ★ 561 |
| License | MIT | Apache-2.0 |
| Written in | C++ | Python |
| Last push | 2025-05-27 | 2026-08-28 |
| Forks | ⑂ 8.3K | ⑂ 53 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick GPT4All if
- You weight community size — 77K stars and counting
- You want the MIT license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick langtest if
- You want the langtest feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and langtest fits your workflow better
About GPT4All
GPT4All Now with support for DeepSeek R1 Distillations Website • Documentation • Discord • YouTube Tutorial GPT4All runs large language models (LLMs) privately on everyday desktops & laptops. No API calls or GPUs required you can just download the application and get started . Read about what's new in our blog . Subscribe to the newsletter GPT4All is made possible by our compute partner Paperspace . Download Links — Windows Installer — — Windows ARM Installer — — macOS Installer — — Ubuntu Installer — The Windows and Linux builds require Intel Core…
read the full GPT4All overview →
About langtest
LangTest: Deliver Safe & Effective Language Models Project's Website • Key Features • How To Use • Benchmark Datasets • Community Support • Contributing • Mission • License Project's Website Take a look at our official page for user documentation and examples: langtest.org Key Features Generate and execute more than 60 distinct types of tests only with 1 line of code Test all aspects of model quality: robustness, bias, representation, fairness and accuracy. Automatically augment training data based on test results (for select models) Support for popular NLP frameworks for NER, Translation and Text…
read the full langtest overview →
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Frequently asked questions
Is GPT4All or langtest more popular?
GPT4All has 77,347 GitHub stars and langtest has 561. GPT4All has the larger community by that measure.
Are GPT4All and langtest free?
Both are open source. GPT4All is licensed under MIT and langtest under Apache-2.0. Neither carries a licence fee.
What is the difference between GPT4All and langtest?
GPT4All is written in C++ and langtest in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, GPT4All or langtest?
Choose GPT4All if you want the larger community (77,347 stars) or its MIT licence terms. Choose langtest if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.