VibeThinker-1.5B by Sina Weibo

1.5B language model with strong reasoning at tiny cost

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VibeThinker-1.5B is a 1.5B-parameter dense language model trained for only $7,800. It delivers reasoning performance comparable to much larger models (e.g., GPT OSS-20B Medium) while staying small, efficient, and easy to run—ideal for research, startups, and edge deployment.
VibeThinker-1.5B by Sina Weibo gallery image
VibeThinker-1.5B by Sina Weibo gallery image
VibeThinker-1.5B by Sina Weibo gallery image
VibeThinker-1.5B by Sina Weibo gallery image
Free
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