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README.md
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license: mit
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---
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license: mit
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base_model: microsoft/Phi-4-multimodal-instruct
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quantization_method: bitsandbytes
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quantization_config:
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load_in_4bit: true
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bnb_4bit_quant_type: nf4
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bnb_4bit_compute_dtype: torch.bfloat16
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bnb_4bit_use_double_quant: true
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tags:
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- phi
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- phi-4
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- phi-4-multimodal
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- multimodal
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- quantized
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- 4bit
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- bitsandbytes
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- bubblspace
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---
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# Bubbl-P4-multimodal-instruct (4-bit Quantized)
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This repository contains a 4-bit quantized version of the `microsoft/Phi-4-multimodal-instruct` model.
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Quantization was performed using the `bitsandbytes` library integrated with `transformers`.
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## Model Description
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* **Original Model:** [microsoft/Phi-4-multimodal-instruct](https://huggingface.co/microsoft/Phi-4-multimodal-instruct)
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* **Quantization Method:** `bitsandbytes` Post-Training Quantization (PTQ)
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* **Precision:** 4-bit
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* **Quantization Config:**
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* `load_in_4bit=True`
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* `bnb_4bit_quant_type="nf4"` (NormalFloat 4-bit)
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* `bnb_4bit_compute_dtype=torch.bfloat16` (Computation performed in BF16 for compatible GPUs like A100)
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* `bnb_4bit_use_double_quant=True` (Enables nested quantization for potentially more memory savings)
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This version was created to provide the capabilities of Phi-4-multimodal with a significantly reduced memory footprint, making it suitable for deployment on GPUs with lower VRAM.
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## Intended Use
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This quantized model is primarily intended for scenarios where VRAM resources are constrained, but the advanced multimodal reasoning, language understanding, and instruction-following capabilities of `Phi-4-multimodal-instruct` are desired.
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Refer to the [original model card](https://huggingface.co/microsoft/Phi-4-multimodal-instruct) for the full range of intended uses and capabilities of the base model.
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## How to Use
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You can load this 4-bit quantized model directly using the `transformers` library. Ensure you have `bitsandbytes` and `accelerate` installed (`pip install transformers bitsandbytes accelerate torch torchvision pillow soundfile scipy sentencepiece protobuf`).
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```python
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from transformers import AutoModelForCausalLM, AutoProcessor
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import torch
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model_id = "bubblspace/Bubbl-P4-multimodal-instruct"
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# Load the processor (requires trust_remote_code)
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processor = AutoProcessor.from_pretrained(model_id, trust_remote_code=True)
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# Load the model with 4-bit quantization enabled
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# The quantization config is loaded automatically from the model's config file
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model = AutoModelForCausalLM.from_pretrained(
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model_id,
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trust_remote_code=True, # Essential for Phi-4 models
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load_in_4bit=True, # Explicitly activate 4-bit loading (though config should handle it)
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device_map="auto" # Automatically map model layers to available GPU(s)
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# torch_dtype=torch.bfloat16 # Often not needed here as bnb_4bit_compute_dtype is handled
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)
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print("4-bit quantized model loaded successfully!")
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# --- Example: Text Inference ---
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prompt = "<|user|>\nExplain the benefits of model quantization.<|end|>\n<|assistant|>"
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inputs = processor(text=prompt, return_tensors="pt").to(model.device)
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outputs = model.generate(**inputs, max_new_tokens=150)
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response_text = processor.batch_decode(outputs)[0]
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print(response_text)
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# --- Example: Image Inference Placeholder ---
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# from PIL import Image
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# import requests
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# url = "your_image_url.jpg"
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# image = Image.open(requests.get(url, stream=True).raw)
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# image_prompt = "<|user|>\n<|image_1|>\nDescribe this image.<|end|>\n<|assistant|>"
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# inputs = processor(text=image_prompt, images=image, return_tensors="pt").to(model.device)
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# outputs = model.generate(**inputs, max_new_tokens=100)
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# response_text = processor.batch_decode(outputs, skip_special_tokens=True)[0]
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# print(response_text)
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# --- Example: Audio Inference Placeholder ---
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# import soundfile as sf
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# audio_path = "your_audio.wav"
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# audio_array, sampling_rate = sf.read(audio_path)
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# audio_prompt = "<|user|>\n<|audio_1|>\nTranscribe this audio.<|end|>\n<|assistant|>"
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# inputs = processor(text=audio_prompt, audios=[(audio_array, sampling_rate)], return_tensors="pt").to(model.device)
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# # ... generate and decode ...
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```
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**Important:** Remember to always pass `trust_remote_code=True` when loading both the processor and the model for Phi-4 architectures.
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## Hardware Requirements
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* Requires a CUDA-enabled GPU.
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* The 4-bit quantization significantly reduces VRAM requirements compared to the original BF16 model (approx. 11-12GB). This version should fit comfortably on GPUs with ~10GB VRAM, and potentially less depending on context length and batch size (evaluation recommended).
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* Performance gains (inference speed) compared to the original are most noticeable on GPUs that efficiently handle lower-precision operations (e.g., NVIDIA Ampere, Ada Lovelace series like A100, L4, RTX 30/40xx).
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## Limitations and Considerations
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* **Potential Accuracy Impact:** While 4-bit quantization aims to preserve performance, there might be a slight degradation in accuracy compared to the original BF16 model. Users should evaluate the model's performance on their specific tasks to ensure the trade-off is acceptable.
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* **Inference Speed:** Memory usage is significantly reduced. Inference speed may or may not be faster than the original BF16 model; it depends heavily on the hardware, batch size, sequence length, and specific implementation details. Test on your target hardware.
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* **Multimodal Evaluation:** Quantization primarily affects the model weights. Thorough evaluation on specific vision and audio tasks is recommended to confirm performance characteristics for multimodal use cases.
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* **Inherited Limitations:** This model inherits the limitations, biases, and safety considerations of the original `microsoft/Phi-4-multimodal-instruct` model. Please refer to its model card for detailed information on responsible AI practices.
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## License
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The model is licensed under the [MIT License](LICENSE), consistent with the original `microsoft/Phi-4-multimodal-instruct` model.
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## Citation
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Please cite the original work if you use this model:
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```bibtex
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@misc{phi4multimodal2025,
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title={Phi-4-multimodal: A Compact Multimodal Model for Recommendation, Recognition, and Reasoning},
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author={Microsoft},
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year={2025},
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eprint={2503.01743},
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archivePrefix={arXiv},
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primaryClass={cs.CL}
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}
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```
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```
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Additionally, if you use this specific 4-bit quantized version, please acknowledge **Bubblspace** ([bubblspace.com](https://bubblspace.com)) and **AIEDX** ([aiedx.com](https://aiedx.com)) for providing this quantized model. You could add a note such as:
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> *"We used the 4-bit quantized version of Phi-4-multimodal-instruct provided by Bubblspace/AIEDX, available at huggingface.co/bubblspace/Bubbl-P4-multimodal-instruct."*
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