Yi-9B-Chat

Compact, Capable & Conversational

What is Yi-9B-Chat?

Yi-9B-Chat is the chat-optimized version of the Yi-9B model, a powerful and efficient 9 billion parameter large language model developed by 01.AI. Designed for real-world use cases, it delivers excellent performance in instruction-following, multi-turn conversations, code generation, and multilingual interactions—all while maintaining efficient deployment and scalability.

Released under the Apache 2.0 license, Yi-9B-Chat is fully open, enabling commercial and research use, fine-tuning, and customization with complete access to model weights.

Key Features of Yi-9B-Chat

Optimized 9B Transformer Architecture

Balances performance and efficiency for fast inference and robust NLP capabilities.

Instruction & Dialogue Tuning

Trained for task-following, multi-turn conversation, summarization, Q&A, and assistant-style interactions.

Multilingual Capabilities

Supports 50+ languages including English, Chinese, French, Arabic, Hindi, and more.

Code Generation Friendly

Performs strongly in code generation, code completion, and debugging tasks for developers.

Truly Open & Permissive

Licensed under Apache 2.0—commercial-friendly and fully transparent with open weights.

Enterprise-Ready & Scalable

Lightweight enough for on-device inference and scalable across cloud or local infrastructure.

Use Cases of Yi-9B-Chat

Power chatbots, virtual assistants, and voice-based AI applications with real-world dialogue performance.

Integrate into IDEs or tools for smart code completions, explanations, and generation.

Serve international audiences through AI systems that support diverse languages with fluency.

Use as a base model for instruction-tuned AI experiments, custom datasets, and domain-specific fine-tuning.

Run powerful AI models on edge devices and local hardware with efficiency and responsiveness.

Yi-9B-Chat

vs

Other LLMs

Feature	GPT-3.5 Chat	LLaMA 2 Chat 13B	Mistral 7B Instruct	Yi-9B-Chat
Model Type	Dense Transformer	Dense Transformer	Dense Transformer	Dense Transformer
Total Parameters	~6.7B	13B	7B	9B
Licensing	Closed	Open	Open	Apache 2.0 Open
Multilingual Support	Moderate	Moderate	Basic	Advanced
Code Generation	Moderate	Good	Moderate	Strong
Best Use Case	General Chat	Research + Apps	Instruction Tasks	Efficient Chat + Dev
Inference Cost	Low	Moderate	Low	Low