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VibeThinker 1.5B Mlx 4bit by mlx-community

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VibeThinker 1.5B Mlx 4bit is an open-source language model by mlx-community. Features: 1.5b LLM, VRAM: 0.9GB, Context: 128K, License: mit, Quantized.

  Arxiv:2511.06221   4-bit   4bit Base model:quantized:weiboai/v... Base model:weiboai/vibethinker...   Code   Conversational   En   Gpqa   Math   Mlx   Quantized   Qwen2   Region:us   Safetensors
Model Card on HF 🤗: https://huggingface.co/mlx-community/VibeThinker-1.5B-mlx-4bit 
VibeThinker 1.5B Mlx 4bit (mlx-community/VibeThinker-1.5B-mlx-4bit)
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VibeThinker 1.5B Mlx 4bit Parameters and Internals

LLM NameVibeThinker 1.5B Mlx 4bit
Repository 🤗https://huggingface.co/mlx-community/VibeThinker-1.5B-mlx-4bit 
Base Model(s)  WeiboAI/VibeThinker-1.5B   WeiboAI/VibeThinker-1.5B
Model Size1.5b
Required VRAM0.9 GB
Updated2026-03-27
Maintainermlx-community
Model Typeqwen2
Model Files  0.9 GB
Supported Languagesen
Quantization Type4bit
Model ArchitectureQwen2ForCausalLM
Licensemit
Context Length131072
Model Max Length131072
Transformers Version4.56.1
Tokenizer ClassQwen2Tokenizer
Padding Token<|endoftext|>
Vocabulary Size151936
Errorsreplace

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Note: green Score (e.g. "73.2") means that the model is better than mlx-community/VibeThinker-1.5B-mlx-4bit.

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Instruction Following and Task Automation  
Factuality and Completeness of Knowledge  
Censorship and Alignment  
Data Analysis and Insight Generation  
Text Generation  
Text Summarization and Feature Extraction  
Code Generation  
Multi-Language Support and Translation  

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