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README.md
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tags:
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- fp8
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- fp8-dynamic
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- vllm
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- llm-compressor
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- internvl3.5
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- internvl
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language:
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license: mit
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base_model: OpenGVLab/InternVL3_5-38B
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base_model_relation: quantized
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library_name: vllm
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---
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# InternVL3.5 38B FP8
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This is an FP8 dynamically quantized (W8A8) version of `OpenGVLab/InternVL3_5-38B`optimized for high-performance inference
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The quantization process uses a specialized recipe that preserves the model's core visual understanding capabilities while reducing the memory footprint by nearly 40%.
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## Just Run It (vLLM serve)
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You can serve the model using vLLM's OpenAI-compatible API server.
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```bash
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vllm serve brandonbeiler/InternVL3_5-38B-FP8-Dynamic \
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--quantization compressed-tensors \
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--served-model-name internvl3_5-38b \
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--reasoning-parser qwen3 \
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--trust-remote-code \
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--max-model-len 32768 \
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--tensor-parallel-size 1 # Adjust based on your GPU setup
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```
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**Notes**
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- 32k max context length
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- reasoning parser ready to go, requires system prompt to run in thinking mode
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- still investigating tool calling
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## Key Features
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* **Calibration-Free FP8:** Dynamic W8A8 quantization. Weights are pre-quantized, and activations are quantized on the fly.
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* **Vision-Language Optimized:** The vision tower, embeddings, and the first MLP layer are preserved in full precision to maintain high performance on vision-language tasks.
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* **vLLM Ready:** Designed for seamless integration with vLLM for high-throughput serving.
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* **Memory Efficient:** ~40% memory reduction compared to the original FP16 model.
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* **Performance Boost:** Accelerated inference on FP8-compatible hardware (e.g., NVIDIA H100, L40S).
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## Model Details
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| Attribute | Value |
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| :--- | :--- |
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| **Original Model** | [OpenGVLab/InternVL3_5-38B](https://huggingface.co/OpenGVLab/InternVL3_5-38B) |
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| **Quantized Model** | `brandonbeiler/InternVL3_5-38B-FP8-Dynamic` |
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| **Quantization Method** | FP8 Dynamic (W8A8) |
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| **Quantization Library** | [LLM Compressor](https://github.com/vllm-project/llm-compressor) v0.7.1 |
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| **Quantized By** | [brandonbeiler](https://huggingface.co/brandonbeiler) |
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## Usage with vLLM in Python
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The following snippet demonstrates inference using the vLLM library.
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```python
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from vllm import LLM, SamplingParams
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# Load the quantized model
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# trust_remote_code is required to load the custom model architecture. [32, 44, 45, 48]
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model = LLM(
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model="brandonbeiler/InternVL3_5-38B-FP8-Dynamic",
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trust_remote_code=True,
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max_model_len=32768, # InternVL 3.5 supports a 32k context length. [19, 41]
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tensor_parallel_size=1, # Adjust for your hardware setup. [11, 15, 38, 40]
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)
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# Set sampling parameters
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# A temperature of 0.6 is recommended for this model. [39]
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sampling_params = SamplingParams(temperature=0.6, max_tokens=512)
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# Generate a response
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# Note: Replace "<image>" with your image input
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prompt = "Describe this image: <image>"
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response = model.generate(prompt, sampling_params)
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print(response[0].outputs[0].text)
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```
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## Technical Specifications
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### Hardware Requirements
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* **Base VRAM:** ~47GB (for model weights)
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* **Context VRAM:**
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* \+ ~1.3GB for 10k token context
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* \+ ~2GB for 32k token context with FP8 KV cache
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* **Recommended GPUs:** NVIDIA H100, L40S
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* **Supported GPUs:** NVIDIA A100 (80GB), 2x RTX 4090 (with tensor parallelism), latest AMD GPUs.
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* **Optimal Performance:** NVIDIA GPUs with Compute Capability >= 9.0 (Hopper, Blackwell).
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### Quantization Details
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* **Weights:** FP8 E4M3 with per-tensor scales.
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* **Activations:** Dynamically quantized to FP8 E4M3 with per-tensor scales.
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* **Preserved Modules (Full Precision):** Vision tower, embeddings, and the first MLP layer (mlp1).
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## Package Versions
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This model was quantized using the following environment:
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```
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llmcompressor==0.7.1
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compressed-tensors==0.10.2
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transformers==4.55.0
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torch==2.7.1
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vllm==0.10.1.1
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```
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*Quantized with ❤️ using [LLM Compressor](https://github.com/vllm-project/llm-compressor) for the open-source community.*
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tags:
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- fp8
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- fp8-dynamic
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- internvl3.5
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- internvl
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language:
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license: mit
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base_model: OpenGVLab/InternVL3_5-38B
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base_model_relation: quantized
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---
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# InternVL3.5 38B FP8
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This is an FP8 dynamically quantized (W8A8) version of `OpenGVLab/InternVL3_5-38B`optimized for high-performance inference.
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The quantization process uses a specialized recipe that preserves the model's core visual understanding capabilities while reducing the memory footprint by nearly 40%.
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**Notes**
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- 32k max context length
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- reasoning parser ready to go, requires system prompt to run in thinking mode
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- still investigating tool calling
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## Model Details
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| Attribute | Value |
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| :--- | :--- |
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| **Original Model** | [OpenGVLab/InternVL3_5-38B](https://huggingface.co/OpenGVLab/InternVL3_5-38B) |
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| **Quantization Method** | FP8 Dynamic (W8A8) |
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## Technical Specifications
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### Quantization Details
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* **Weights:** FP8 E4M3 with per-tensor scales.
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* **Activations:** Dynamically quantized to FP8 E4M3 with per-tensor scales.
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* **Preserved Modules (Full Precision):** Vision tower, embeddings, and the first MLP layer (mlp1).
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