Weibo’s new open source AI model VibeThinker-1.5B outperforms DeepSeek-R1 on a $7,800 post-training budget
Another day in late 2025, another impressive achievement from a Chinese open source artificial intelligence company. The AI arm of Chinese social networking company Weibo recently released the open source VibeThinker-1.5B. It is a 1.5 billion parameter large language model (LLM) that is a tweaked version of rival Chinese technology company Alibaba’s Qwen2.5-Math-1.5B. Now, researchers…
