Yi (01.AI)

零一万物🇨🇳 Works in China

01.AI — strong open-source AI models from Kai-Fu Lee's team

★★★★★4.2

Difficulty:Easy to learn

Visit Website ↗🔌 API Docs

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Pricing

Free / Paid

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Free Tier

✓

🇨🇳

China VPN

✓ No VPN

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API

✓

📖 About

Yi by 01.AI (零一万物) — founded by AI pioneer Kai-Fu Lee — delivers competitive open-source LLMs with strong multilingual performance and commercial-friendly licensing.

💰 Pricing

Yi 助手 App Free；API 商业接入pay-as-you-go

✓ Pros

•Competitive open-source quality

•Backed by top AI researcher

•Commercial-friendly

✗ Cons

•Smaller ecosystem than Qwen or DeepSeek

•Less community documentation

•API can be slower

⚡ Key Features

Open-source model releasesStrong multilingual performanceLarge context windowAPI accessCommercial license

🎯 Use Cases

Production LLM integrationResearch and model experimentationMultilingual application developmentOpen-source AI product buildingModel fine-tuning

👤 Best for: Developers who need strong open-source models with commercial licensing for production use

❓ FAQ

Is Yi (01.AI) free? How much does it cost?▾

Yi (01.AI) offers a free tier you can start with right away. Full features require a paid plan: Yi 助手 App Free；API 商业接入pay-as-you-go.

Can I use Yi (01.AI) in China without a VPN?▾

Yes — Yi (01.AI) is directly accessible in mainland China without a VPN.

How do I get started with Yi (01.AI)?▾

Getting started with Yi (01.AI): ① Visit https://www.01.ai and create an account; ② The free tier gives you immediate access to core features; ③ Key features to explore: Open-source model releases, Strong multilingual performance, Large context window. It's best suited for: Developers who need strong open-source models with commercial licensing for production use.

Does Yi (01.AI) have an API?▾

Yes — Yi (01.AI) offers an official API for developers. Visit the official documentation on their website to get an API key and explore integration options.

Who is Yi (01.AI) best for?▾

Yi (01.AI) is best for: Developers who need strong open-source models with commercial licensing for production use. Its main strengths are Competitive open-source quality and Backed by top AI researcher. Common use cases include: Production LLM integration, Research and model experimentation, Multilingual application development.

What are the pros and cons of Yi (01.AI)?▾

Pros: Competitive open-source quality; Backed by top AI researcher; Commercial-friendly. Cons: Smaller ecosystem than Qwen or DeepSeek; Less community documentation; API can be slower. Overall: 01.AI — strong open-source AI models from Kai-Fu Lee's team.

Yi (01.AI) vs Kimi: which is better?▾

Yi (01.AI) vs Kimi: Yi (01.AI) excels at Competitive open-source quality and Backed by top AI researcher, making it ideal for Developers who need strong open-source models with commercial licensing for production use. Both have their strengths — the right choice depends on your specific workflow and budget.

Is Yi (01.AI) safe to use?▾

Yi (01.AI) is developed by 零一万物. Before use, review their official privacy policy. Avoid uploading personally sensitive information. Enterprise users should look for plans with data isolation guarantees.