Yi-9B
9B bilingual base model that topped its size class in early 2024.
About
Yi-9B is a 9 billion parameter bilingual language model from 01.AI, open-sourced on March 6, 2024. It stood out as a top performer among similar-sized open models of its era, including Mistral-7B, SOLAR-10.7B, and Gemma-7B, with particular strength in code, math, common-sense reasoning, and reading comprehension.
The model is Apache 2.0 licensed and available on Hugging Face, with a 200K-context variant (Yi-9B-200K) released shortly after. It became a popular base for fine-tunes and remains a reference point for the 9B size class.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 132; Trending score 76/100 from researcher assessment.