Yi Chat
lingyiwanwu.com
01.AI's large language model assistant.
Quick Information
- Category:
- Writing & Chat
- Pricing:
- Freemium
- Platforms:
- Web, API
- Free Plan:
- Yes
- API Available:
- Yes
- Last Verified:
- September 2026
What Is Yi Chat?
Yi Chat is 01.AI's large language model assistant, built on the Yi family of open-source and proprietary LLMs from 01.AI (founded by Kai-Fu Lee). The Lingyiwanwu open platform exposes OpenAI-compatible inference for Yi-Lightning, Yi-Lightning-Lite, Yi-Large, and Yi-Vision, with Yi 1.5 models (6B, 9B, and 34B parameter variants) available under an Apache 2.0 open-source license providing deployment flexibility, and Yi Large offering a 33K context window starting at $3.00 per 1M input/output tokens. In January 2026, 01.AI was recognized as a national-level high-tech enterprise and a Beijing "specialized and innovative" SME, and it was included in the 2026 Forbes China Top 50 AI Technology Companies list. The company also released the Wanzhi enterprise large model all-in-one platform in March 2025, covering model deployment, application practice, and fine-tuning tools.
Its Apache 2.0 open-source licensing for the Yi 1.5 model series is a genuinely significant deployment flexibility advantage over closed-source competitors, letting organizations self-host and fine-tune the models without vendor lock-in, while Yi-Large's API remains available for those preferring managed inference.
It's aimed at developers and enterprises wanting flexible access to a capable Chinese LLM family, either through self-hosted open-source Yi 1.5 models or via managed API access to Yi-Large and Yi-Vision, with continued institutional recognition (Forbes China Top 50, national high-tech enterprise status) reflecting real ongoing credibility in the competitive Chinese AI market — anyone evaluating LLM options for deployment flexibility should specifically weigh the Apache 2.0 license against typically more restrictive licensing from Western closed-source alternatives. See our Chatbots & Conversational AI tools directory for related tools like DeepSeek and Qwen Chat.
What Can You Use Yi Chat For?
Open-source LLM self-hosting
Deploys Yi 1.5 models (6B-34B) under Apache 2.0 licensing for full deployment flexibility.
Managed API-based chat and reasoning
Accesses Yi-Lightning, Yi-Large, and Yi-Vision via OpenAI-compatible API inference.
Enterprise model fine-tuning
Uses the Wanzhi platform for model deployment, application practice, and fine-tuning.
Yi Chat Features
- Apache 2.0 licensed Yi 1.5 models — Provides open-source models (6B, 9B, 34B parameters) with full deployment flexibility.
- OpenAI-compatible API — Exposes Yi-Lightning, Yi-Large, and Yi-Vision through OpenAI-compatible inference endpoints.
- Wanzhi enterprise platform — Provides model deployment, application practice, and fine-tuning tools for enterprises.
Who Is Yi Chat For?
- Developers wanting open-source LLM flexibility — Uses Apache 2.0 licensed Yi 1.5 models for self-hosting without vendor lock-in.
- Enterprises needing managed API access — Uses Yi-Large and Yi-Vision via OpenAI-compatible API inference.
Yi Chat Pros & Limitations
What We Like
- Apache 2.0 open-source licensing for Yi 1.5 models provides genuine deployment flexibility over closed-source competitors
- OpenAI-compatible API makes integration straightforward for teams already familiar with that API format
- Continued institutional recognition (Forbes China Top 50, national high-tech enterprise status) reflects real ongoing credibility
Limitations
- Yi-Large API pricing ($3.00/1M tokens) requires cost evaluation against competing managed LLM APIs
- Self-hosting open-source models requires technical infrastructure and expertise
- Primarily positioned within the Chinese AI market, which may affect support and documentation for non-Chinese users
Yi Chat Pricing
| Plan | Price | Main Features |
|---|---|---|
| Yi 1.5 (open source) | Free (self-hosted) | Apache 2.0 licensed models, 6B-34B parameters |
| Yi-Large API | $3.00/1M input and output tokens | 33K context window, managed inference |
Pricing was last verified September 2026. Check the official website for the latest pricing.
AI Listing Jungle Ranking
- Global Rank:
- #888
- Overall Score:
- 0.0/100
- Monthly Users:
- –
- Rank Change:
- –
This ranking reflects AI Listing Jungle's own independent scoring methodology and is not an endorsement by Yi Chat or its company. How Our Rankings Work
Frequently Asked Questions
Is Yi Chat open source?
Yes, the Yi 1.5 model series is available under Apache 2.0 licensing for self-hosting.
How much does the Yi-Large API cost?
$3.00 per 1M input and output tokens.
Who created Yi Chat?
01.AI, founded by Kai-Fu Lee.
What is the Wanzhi platform?
An enterprise all-in-one platform for model deployment, application practice, and fine-tuning.
Our Take
Yi Chat's Apache 2.0 open-source licensing for the Yi 1.5 model series is a genuinely significant deployment flexibility advantage, letting organizations self-host and fine-tune without vendor lock-in.
Continued institutional recognition, including a 2026 Forbes China Top 50 AI Technology Companies listing, reflects real ongoing credibility in the competitive Chinese AI market.
Yi Chat Alternatives
Yi Chat Comparisons
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