Curiosity · AI Model
Yi-Large
Yi-Large is the flagship hosted model from 01.AI — the Chinese AI lab founded by Kai-Fu Lee. Built alongside a family of open-weight Yi models on HuggingFace, Yi-Large is the closed, enterprise-tier offering: 32k context, bilingual Chinese/English excellence, and an API tuned for retrieval-augmented chat.
Model specs
- Vendor
- 01.AI
- Family
- Yi
- Released
- 2024-05
- Context window
- 32,000 tokens
- Modalities
- text
- Input price
- $3/M tok
- Output price
- $3/M tok
- Pricing as of
- 2026-04-20
Strengths
- Strong bilingual (CN/EN) quality at a competitive price
- Backed by experienced team (Kai-Fu Lee / Sinovation Ventures)
- Companion open-weight Yi-34B available for self-hosting
Limitations
- No vision or audio modalities
- Smaller context than GLM-4 Plus (32k vs 128k)
- Lags Qwen and DeepSeek on some 2025 reasoning benchmarks
Use cases
- Chinese/English enterprise chatbots
- RAG pipelines with bilingual knowledge bases
- Content generation for Chinese domestic markets
- Summarisation of long bilingual documents
Benchmarks
| Benchmark | Score | As of |
|---|---|---|
| MMLU | ~78% | 2026-04 |
| C-Eval | ~82% | 2026-04 |
| AlpacaEval 2.0 | ~30% | 2026-04 |
Frequently asked questions
What is Yi-Large?
Yi-Large is 01.AI's flagship hosted LLM — a bilingual Chinese/English model tuned for enterprise chat and RAG. It is the closed, API-only counterpart to the open-weight Yi family on HuggingFace.
Who is behind 01.AI?
01.AI was founded in 2023 by Kai-Fu Lee, former head of Google China and founder of Sinovation Ventures. It is one of China's major LLM labs, alongside Zhipu, Moonshot, and Baichuan.
Sources
- 01.AI — Yi platform — accessed 2026-04-20
- 01.AI on HuggingFace — accessed 2026-04-20