head to head · open source
one-api vs datamodel-code-generator
one-api has 37,316 GitHub stars, 6,887 forks, 1,036 open issues and last shipped 10 months ago. datamodel-code-generator has 4,047 stars, 484 forks, 23 open issues and last shipped yesterday. one-api leads on adoption by 822% (37,316 vs 4,047 stars). one-api is written in JavaScript under MIT; datamodel-code-generator is written in Python under MIT. one-api has attracted 18% as many forks as stars, datamodel-code-generator 12%. 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 | 2026-11-02 |
| Forks | ⑂ 6.9K | ⑂ 484 |
| 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
中文 English 日本語 One API ✨ 通过标准的 OpenAI API 格式访问所有的大模型，开箱即用 ✨ 部署教程 · 使用方法 · 意见反馈 · 截图展示 · 在线演示 · 常见问题 · 相关项目 · 赞赏支持 [!NOTE] 本项目为开源项目，使用者必须在遵循 OpenAI 的使用条款以及 法律法规 的情况下使用，不得用于非法用途。 根据《生成式人工智能服务管理暂行办法》的要求，请勿对中国地区公众提供一切未经备案的生成式人工智能服务。 [!NOTE] 稳定版 / 预览版镜像地址：justsong/one api 或者 ghcr.io/songquanpeng/one api alpha 版镜像地址：justsong/one api alpha 或者 ghcr.io/songquanpeng/one api alpha [!WARNING] 使用 root 用户初次登录系统后，务必修改默认密码 123456 ！ 功能 1. 支持多种大模型： + [x] OpenAI ChatGPT 系列模型（支持 Azure OpenAI API） + [x] Anthropic Claude 系列模型 (支持 AWS Claude) + [x] Google PaLM2/Gemini 系列模型 + [x] Mistral 系列模型 + [x] 字节跳动豆包大模型（火山引擎） + [x] 百度文心一言系列模型 +…
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…
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 37,316 GitHub stars and datamodel-code-generator has 4,047. 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 (37,316 stars) or its MIT licence terms. Choose datamodel-code-generator if its feature set, stack or MIT licence fits better. Both are self-hostable.