# Weibo AI Releases VibeThinker-3B, a Compact Reasoning Model

> The new 3-billion-parameter model from the Chinese tech giant focuses on challenging benchmarks in mathematics, coding, and graduate-level questions.

Published by The Open Weights on Jun 12, 2026. Canonical: https://theopenweights.com/news/vibethinker-3b-3am6

## Key facts

- Company: WeiboAI
- Model: VibeThinker-3B
- Version: 3B
- Category: Reasoning
- Modalities: Reasoning, Text / LLM, Code
- License: Other (Open weights, commercial use allowed)
- Parameters: 3B
- Context window: 131K tokens
- Architecture: Qwen2ForCausalLM
- Precision: BF16
- Weights size: 6.2 GB
- Significance: notable
- Published: 2026-06-12
- Last verified: 2026-07-03
- Hugging Face: https://huggingface.co/WeiboAI/VibeThinker-3B
- Canonical URL: https://theopenweights.com/news/vibethinker-3b-3am6

Chinese technology company Weibo has introduced VibeThinker-3B, a new small language model focused on advanced reasoning. At just three billion parameters, the model is part of a growing class of highly efficient models designed to deliver specialized performance without the massive computational overhead of their larger counterparts.

According to the [release card on Hugging Face](https://huggingface.co/WeiboAI/VibeThinker-3B), VibeThinker-3B was developed to excel at specific, difficult tasks. The creators highlight its performance on benchmarks that test mathematical ability (GSM8K, MATH), code generation (HumanEval), and graduate-level, Google-proof question answering (GPQA), indicating a focus on deep, domain-specific problem-solving rather than general conversation.

## A Niche Specialist

The model's deliberate focus on reasoning-intensive domains is what sets it apart. While many small models aim for broad competence, VibeThinker-3B is positioned as a specialist. This strategy allows smaller models to potentially outperform much larger ones on targeted tasks, making them valuable components for applications requiring reliable logic, math, or code intelligence.

Why it matters: The release of specialized models like VibeThinker-3B demonstrates a maturing ecosystem where developers can choose the right tool for the job. Instead of relying on a single, monolithic model, teams can deploy smaller, more cost-effective models fine-tuned for specific needs. Prospective users should note the model is released under a custom license, and its terms should be reviewed before use.

## Get the model

- [Hugging Face](https://huggingface.co/WeiboAI/VibeThinker-3B)

## Sources

- [WeiboAI/VibeThinker-3B](https://huggingface.co/WeiboAI/VibeThinker-3B) — Hugging Face, Jun 12, 2026

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Source: The Open Weights (https://theopenweights.com/). Aggregated and written by Claude, curated by humans. Cite as: "Weibo AI Releases VibeThinker-3B, a Compact Reasoning Model", The Open Weights, Jun 12, 2026, https://theopenweights.com/news/vibethinker-3b-3am6