Add model card for Mini-o3

README.md

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+---
+license: cc-by-nc-4.0
+pipeline_tag: image-text-to-text
+library_name: transformers
+---
+
+# Mini-o3: Scaling Up Reasoning Patterns and Interaction Turns for Visual Search
+
+This repository contains the official code and model checkpoints for the paper [Mini-o3: Scaling Up Reasoning Patterns and Interaction Turns for Visual Search](https://huggingface.co/papers/2509.07969).
+
+Mini-o3 is a system that leverages image-based tools with reinforcement learning to tackle visual problems. It addresses limitations of existing open-source approaches by scaling up tool-based interactions, allowing for deep, multi-turn reasoning – spanning tens of steps – to solve challenging visual search tasks with state-of-the-art performance.
+
+## Project Page
+[https://mini-o3.github.io/](https://mini-o3.github.io/)
+
+## Code
+[https://github.com/Mini-o3/Mini-o3](https://github.com/Mini-o3/Mini-o3)
+
+## Abstract
+Recent advances in large multimodal models have leveraged image-based tools with reinforcement learning to tackle visual problems. However, existing open-source approaches often exhibit monotonous reasoning patterns and allow only a limited number of interaction turns, making them inadequate for difficult tasks that require trial-and-error exploration. In this work, we address this limitation by scaling up tool-based interactions and introduce Mini-o3, a system that executes deep, multi-turn reasoning -- spanning tens of steps -- and achieves state-of-the-art performance on challenging visual search tasks. Our recipe for reproducing OpenAI o3-style behaviors comprises three key components. First, we construct the Visual Probe Dataset, a collection of thousands of challenging visual search problems designed for exploratory reasoning. Second, we develop an iterative data collection pipeline to obtain cold-start trajectories that exhibit diverse reasoning patterns, including depth-first search, trial-and-error, and goal maintenance. Third, we propose an over-turn masking strategy that prevents penalization of over-turn responses (those that hit the maximum number of turns) during reinforcement learning, thereby balancing training-time efficiency with test-time scalability. Despite training with an upper bound of only six interaction turns, our model generates trajectories that naturally scale to tens of turns at inference time, with accuracy improving as the number of turns increases. Extensive experiments demonstrate that Mini-o3 produces rich reasoning patterns and deep thinking paths, effectively solving challenging visual search problems.
+
+## Citation
+
+If you find this repo useful for your research, please consider citing the paper:
+```bibtex
+@article{lai2025mini-o3,
+  title={Mini-o3: Scaling Up Reasoning Patterns and Interaction Turns for Visual Search},
+  author={Lai, Xin and Li, Junyi and Li, Wei and Liu, Tao and Li, Tianjian and Zhao, Hengshuang},
+  journal={arXiv:2509.07969},
+  year={2025}
+}
+```