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Z.ai

★ 7k+

Open models and developer tools from Z.ai (Zhipu), including the GLM family, coding plugins, and APIs for agentic apps.

Z.ai does the job of OpenAI and Anthropic API, self-hosted. It is Apache-2.0-licensed, so you can do essentially what you like with it, and running it properly takes real ops work. OpenAI bills $20+ for it. 7k+ stars on GitHub.

Open-source replacement for OpenAI, Anthropic API.

Licence
Apache-2.0
Self-hosting
Hard
The paid one costs
$20+
GitHub stars
7k+
view the code →official site →

Is it actually a replacement?

We have not written a verdict on OpenAI or Anthropic API yet, so this page says what Z.ai is rather than judging what you would give up. When that product gets a page, this one will link to it.

Z.ai questions

Is Z.ai open source?

Yes — it is released under Apache-2.0.

Can I self-host Z.ai?

Yes — we rate it hard to self-host.

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