Spatial-SSRL-Qwen3VL-4B-FP8

Spatial-SSRL-Qwen3VL-4B-FP8 is an FP8-compressed variant built on top of internlm/Spatial-SSRL-Qwen3VL-4B. This edition applies BF16 · FP8 (F8_E4M3) precision formats to reduce memory footprint and increase inference throughput, while preserving the spatial reasoning and multimodal understanding strengths of the original 4B architecture.

The base Spatial-SSRL-Qwen3VL-4B model is a spatially enhanced vision-language model built upon Qwen3-VL-4B-Instruct. It integrates Spatial-SSRL, a lightweight self-supervised reinforcement learning paradigm designed to scale RLVR efficiently. The model demonstrates strong spatial intelligence while maintaining the original general visual capabilities of its base architecture.

FP8 (8-bit floating point) weight and activation quantization using hardware acceleration on GPUs – FP8 W8A8. Quantization W8A8 FP8-dynamic recipe – examples.

Key Highlights

• BF16 · FP8 (F8_E4M3) Compression: Transformer Engine based FP8 quantization reduces VRAM usage while maintaining spatial reasoning fidelity.
• Spatial-SSRL Optimization: Lightweight self-supervised reinforcement learning enhances spatial grounding and reasoning.
• 4B Vision-Language Backbone: Efficient multimodal performance with balanced compute and memory requirements.
• Strong Spatial Intelligence: Improved object localization, spatial relationships, depth reasoning, and geometric understanding.
• Preserved General Vision Capabilities: Retains captioning, VQA, and multimodal dialogue strengths of Qwen3-VL-4B-Instruct.
• RLVR Compatible Framework: Designed for scalable reinforcement learning with verifiable rewards.
• Optimized Deployment: FP8 compression enables smoother inference on Hopper and other compatible GPU architectures.

About Spatial-SSRL

Spatial-SSRL is a lightweight, tool-free framework naturally compatible with the RLVR training paradigm and easy to extend to a wide range of pretext tasks.

The framework currently formulates five spatially oriented tasks, requiring only standard RGB or RGB-D images. It is modular and extensible, enabling the research community to introduce new spatial pretext objectives that further strengthen large vision-language models.

We welcome contributions to expand Spatial-SSRL with effective spatial reasoning tasks that enhance LVLM capabilities.

Quick Start with Transformers

from transformers import Qwen3VLForConditionalGeneration, AutoProcessor
from qwen_vl_utils import process_vision_info
import torch

# Load the Spatial SSRL Qwen3VL 4B FP8 model
model = Qwen3VLForConditionalGeneration.from_pretrained(
    "internlm/Spatial-SSRL-Qwen3VL-4B-FP8",
    torch_dtype="auto",
    device_map="auto"
)

processor = AutoProcessor.from_pretrained(
    "internlm/Spatial-SSRL-Qwen3VL-4B-FP8"
)

messages = [
    {
        "role": "user",
        "content": [
            {
                "type": "image",
                "image": "sample_image.png",
            },
            {
                "type": "text",
                "text": "Describe spatial relationships between objects and explain their relative positions."
            },
        ],
    }
]

text = processor.apply_chat_template(
    messages, tokenize=False, add_generation_prompt=True
)

image_inputs, video_inputs = process_vision_info(messages)

inputs = processor(
    text=[text],
    images=image_inputs,
    videos=video_inputs,
    padding=True,
    return_tensors="pt",
).to("cuda")

generated_ids = model.generate(**inputs, max_new_tokens=1024)

generated_ids_trimmed = [
    out_ids[len(in_ids):] for in_ids, out_ids in zip(inputs.input_ids, generated_ids)
]

output_text = processor.batch_decode(
    generated_ids_trimmed,
    skip_special_tokens=True,
    clean_up_tokenization_spaces=False
)

print(output_text)

Intended Use

• Spatial Reasoning Research: Evaluating geometric and relational understanding in LVLMs.
• Robotics & Embodied AI: Scene grounding and object relationship modeling.
• Autonomous Systems: Depth and relative positioning analysis.
• 3D Scene Understanding: RGB and RGB-D based spatial inference.
• Multimodal Assistants: Visual question answering with spatial awareness.

Limitations & Risks

Note: This model focuses on spatial reasoning and multimodal understanding.

• Extreme Occlusions: Performance may degrade when objects are heavily occluded.
• Unusual Camera Geometry: Severe distortion or non-standard projections may reduce spatial accuracy.
• Hardware Requirements: FP8 acceleration requires compatible GPU support for optimal throughput.
• Responsible Use: Ensure compliance with safety and deployment regulations in robotics or autonomous systems contexts.