VRPRM-sft / README.md
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---
license: apache-2.0
base_model: Qwen/Qwen3-VL-8B-Thinking
library_name: transformers
pipeline_tag: image-text-to-text
tags:
- process-reward-model
- visual-reasoning
- multimodal
- math
- sft
---
# VRPRM-sft
`VRPRM-sft` is the merged supervised checkpoint of VRPRM, a visual reasoning
process reward model. It first generates a global reasoning trace and then emits
a binary `0/1` judgment for each candidate solution step.
## Training
- Base model: `Qwen/Qwen3-VL-8B-Thinking`
- Data: 1,378 multi-turn conversations / 5,592 confident step labels
- Loss weights: 0.5 for global thinking, 2.0 for step judgments
- Tuning: LoRA r=16, alpha=32, lr=1e-4
- Training: 3 epochs / 513 steps, followed by LoRA merge
## Evaluation
VisualProcessBench official no-reference protocol:
| Model | Overall step macro-F1 |
|---|---:|
| VRPRM-sft | 66.15 |
## Usage
Use the two-stage global-thinking protocol from the code repository. First ask
for one `<think>...</think>` block, then query each step with guided choice
`0/1` while feeding previous judgments. The evaluator is
`benchmarks/visualprocessbench/eval_vpb_global_think.py`.
## Limitations
This model is intended for research on process reward modeling and multimodal
reasoning. It is not a general assistant and should not be used for automated
grading of high-stakes work without human review.