head to head · open source
one-api vs datamodel-code-generator
one-api has 36,940 GitHub stars, 6,867 forks, 1,036 open issues and last shipped 8 months ago. datamodel-code-generator has 4,019 stars, 460 forks, 23 open issues and last shipped yesterday. one-api leads on adoption by 819% (36,940 vs 4,019 stars). one-api is written in JavaScript under MIT; datamodel-code-generator is written in Python under MIT. one-api has attracted 19% as many forks as stars, datamodel-code-generator 11%. datamodel-code-generator 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
| one-api | datamodel-code-generator | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 4.0K |
| License | MIT | MIT |
| Written in | JavaScript | Python |
| Last push | 2026-01-09 | 2026-09-17 |
| Forks | ⑂ 6.9K | ⑂ 460 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick one-api if
- You weight community size — 37K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick datamodel-code-generator if
- You want the datamodel-code-generator feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and datamodel-code-generator fits your workflow better
About one-api
One API is a self hosted LLM API management and key redistribution system that exposes many model providers through the standard OpenAI API format, aimed at developers, teams and operators who want a single endpoint, a single key model and a single quota surface across providers.
read the full one-api overview →
About datamodel-code-generator
datamodel code generator 🚀 Generate Python data models from schema definitions in seconds. 📚 Documentation · 🧪 Playground · 💼 Lead maintainer available for work [!NOTE] Playground privacy: Generation runs locally in your browser with Pyodide. Your schema and options are not sent to a backend. Shared repro URLs encode them in the URL fragment ( state=... ), which browsers do not send to the server; the full URL can still be stored in your browser history or wherever you share it. ✨ What it does Pick any one of the supported inputs and pick the Python model style you want as output. input model path/to/file.py:…
read the full datamodel-code-generator overview →
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Frequently asked questions
Is one-api or datamodel-code-generator more popular?
one-api has 36,940 GitHub stars and datamodel-code-generator has 4,019. one-api has the larger community by that measure.
Are one-api and datamodel-code-generator free?
Both are open source. one-api is licensed under MIT and datamodel-code-generator under MIT. Neither carries a licence fee.
What is the difference between one-api and datamodel-code-generator?
one-api is written in JavaScript and datamodel-code-generator 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, one-api or datamodel-code-generator?
Choose one-api if you want the larger community (36,940 stars) or its MIT licence terms. Choose datamodel-code-generator if its feature set, stack or MIT licence fits better. Both are self-hostable.