Weibo AI Lab

Overview

Weibo AI Lab is the artificial intelligence research division of Weibo, operating as a Singapore-based arm of the Chinese social media platform. The lab focuses on developing efficient language models and reasoning capabilities, notably demonstrating that small-parameter models can compete with or outperform larger frontier systems.

Key Developments

VibeThinker Series

• VibeThinker-3B: A compact 3-billion-parameter language model introduced in June 2026.
• Performance Claims: The model achieves frontier-level reasoning capabilities, reportedly outperforming significantly larger “giant” models despite its small size VibeThinker-3B: Small Model Achieves Frontier Reasoning, Outperforming Giants.
• Significance: Represents a shift toward high-efficiency reasoning in smaller model architectures.

References

VibeThinker-3B: Small Model Achieves Frontier Reasoning, Outperforming Giants