Bilibili Releases Open-Source Index-1.9B Small Language Model Series

Jul 14, 2026

Bilibili has released Index-1.9B, a suite of open small language models that includes base, pure, chat, and character variants. The 1.9B-parameter models are pre-trained on 2.8 trillion predominantly Chinese and English tokens and achieve benchmark scores competitive with or exceeding those of open models several times their size. The models and evaluation code are available on GitHub.

Why it matters: This release shows that small, open-source language models can achieve performance comparable to much larger models, potentially making advanced AI more accessible.

Full story at: arXiv Computation and Language ↗