Yi-Lightning

01.AI · 2024 · LLM · China

A to Z

A · App: No
B · Built By: 01.AI
C · CEO & Politics: Kai-Fu Lee — Centrist / bridges US-China tech
D · Date: 2024
E · Expertise: Intermediate+
F · Free Tier: Yes
G · Generates: Text only
H · Deployment: Cloud
I · Inputs: Text
J · Jurisdiction: China
K · Key Staffers: Kai-Fu Lee (CEO/Founder)
L · Languages: Chinese-primary
M · Model Type: LLM
N · Safety Issues: None reported
O · Open Source: Proprietary
P · Pricing: 01.AI China API CNY 0.99/M tokens (input and output); endpoint now also routes to DeepSeek-V3 and Qwen3-30B-A3B
Q · AIDb Rating: [UNKNOWN]
R · What Makes It Special: 01.AI's Yi-Lightning, a flagship mixture-of-experts LLM released in October 2024 that 01.AI describes as a 100B-parameter model, with fine-grained expert segmentation and routing, optimized KV caching and a context extended to 64K tokens; trained with pre-training, supervised fine-tuning and RLHF, it ranked sixth overall on Chatbot Arena, placing second to fourth in Chinese, Math, Coding and Hard Prompts, and is served through 01.AI's developer platform.
S · Stock / Status: Private ($1B+ valuation, Nov 2023; Hong Kong IPO planned for 2027)
T · Training Cutoff: [UNKNOWN]
U · Users: [UNKNOWN]
V · Voice Chat: No
W · Weights: API only
X · X Handle: @01ai_yi
Y · Year Founded: [UNKNOWN]
Z · Bottom Line: Proprietary LLM from 01.AI, released 2024.

Data completeness 85% · Last verified 2026-05-12 · Primary source ↗

“Yi-Lightning.” AIDb — The AI Database. Verified 2026-05-12. https://theaidatabase.com/m/yi-lightning.html