GPT4Free vs SGLang
A side-by-side comparison of two self-hosted self-hosted ai options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | GPT4Free | SGLang |
|---|---|---|
| Deploy effort | ≈5-minute setup | Under-an-hour setup |
| Health score | 100 · Excellent | 99 · Excellent |
| Category | Self-Hosted AI | Self-Hosted AI |
| License | GPL-3.0 | Apache-2.0 |
| Language | Python | Python |
| Setup difficulty | Medium | Hard |
| Min. RAM | 512 MB | 16,384 MB |
| Deployment | docker, source | docker, kubernetes, bare-metal |
| GitHub stars | ★ 66,729 | ★ 36,383 |
| First released | 2023 | 2024 |
| Replaces | OpenAI API | OpenAI API |
What are GPT4Free and SGLang?
GPT4Free
GPT4Free is an open-source project that provides a unified, OpenAI-compatible API and interface for accessing a variety of language and image models. It can be self-hosted as a gateway to route requests across multiple model providers.
- OpenAI-compatible API
- Multiple provider routing
- Self-hosted gateway
- Image and text models
SGLang
SGLang is a high-performance serving framework for large language and vision-language models. It features a fast runtime with RadixAttention and a flexible programming language for complex LLM applications.
- RadixAttention caching
- Structured generation
- OpenAI-compatible server
- Multi-GPU scaling
GPT4Free vs SGLang: key differences
Both projects are written in Python. Licensing differs — GPL-3.0 for GPT4Free versus Apache-2.0 for SGLang. GPT4Free is the lighter option, starting around 512 MB of RAM against 16,384 MB for SGLang.
Why pick each one
Choose GPT4Free if…
- OpenAI-compatible API
- Many providers supported
- No usage costs
Watch out for
- Provider reliability varies
- Subject to upstream changes
Choose SGLang if…
- Very high throughput
- RadixAttention prefix caching
- Vision model support
Watch out for
- Serious GPU required
- Complex tuning options
Frequently asked questions
Is GPT4Free or SGLang better?
GPT4Free is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider SGLang if its specific feature set fits your needs better.
Are GPT4Free and SGLang free and open-source?
Yes. GPT4Free is licensed under GPL-3.0 and SGLang under Apache-2.0. Both can be self-hosted at no software cost.
Can I run GPT4Free and SGLang with Docker?
GPT4Free: yes. SGLang: yes.
Which is lighter on resources, GPT4Free or SGLang?
GPT4Free has the smaller minimum footprint at 512 MB of RAM, compared to about 16,384 MB for SGLang. Real-world usage depends on library size, user count, and enabled features.