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Zixian Ma

11 accepted papers

2026

Molmo2: Open Weights and Data for Vision-Language Models with Video Understanding and Grounding

CVPR 2026

Today's strongest video-language models (VLMs) remain proprietary, and the strongest open-weight models often rely on synthetic data from proprietary VLMs and do not disclose their training data or recipe. As a result, the open-source community lacks the foundations needed to improve on the state-of

Cited by 0SourcecodeScholar
2026

SAGE: Training Smart Any-Horizon Agents for Long Video Reasoning with Reinforcement Learning

CVPR 2026

As humans, we are natural any-horizon reasoners, i.e., we can decide whether to iteratively skim long videos or watch short ones in full when necessary for a given task. With this in mind, one would expect video reasoning models to reason flexibly across different durations. However, SOTA models are

Cited by 0SourcecodeScholar
2026

Unfolding Spatial Cognition: Evaluating Multimodal Models on Visual Simulations

ICLR 2026poster

Spatial cognition is essential for human intelligence, enabling problem-solving through visual simulations rather than solely relying on verbal reasoning. However, existing AI benchmarks primarily assess verbal reasoning, neglecting the complexities of non-verbal, multi-step visual simulation. We in…

Cited by 0SourcecodeScholar
2025

Coarse Correspondences Boost Spatial-Temporal Reasoning in Multimodal Language Model

CVPR 2025poster

Multimodal language models (MLLMs) are increasingly being applied in real-world environments, necessitating their ability to interpret 3D spaces and comprehend temporal dynamics. Current methods often rely on specialized architectural designs or task-specific fine-tuning to achieve this. We introduc…

Cited by 1SourcePDFScholar
2025

LATTE: Learning to Think with Vision Specialists

EMNLP 2025

While open-source vision-language models perform well on simple question-answering, they still struggle with complex questions that require both perceptual and reasoning capabilities. We propose LATTE, a family of vision-language models that have LeArned to Think wiTh vision spEcialists. By offloadi

2024

NaturalBench: Evaluating Vision-Language Models on Natural Adversarial Samples

NeurIPS 2024poster

Vision-language models (VLMs) have made significant progress in recent visual-question-answering (VQA) benchmarks that evaluate complex visio-linguistic reasoning. However, are these models truly effective? In this work, we show that VLMs still struggle with natural images and questions that humans…

Cited by 19SourcePDFScholar
2023

CREPE: Can Vision-Language Foundation Models Reason Compositionally?

CVPR 2023highlight

A fundamental characteristic common to both human vision and natural language is their compositional nature. Yet, despite the performance gains contributed by large vision and language pretraining, we find that--across 7 architectures trained with 4 algorithms on massive datasets--they struggle at c…

2023

SugarCrepe: Fixing Hackable Benchmarks for Vision-Language Compositionality

NeurIPS 2023poster

In the last year alone, a surge of new benchmarks to measure $\textit{compositional}$ understanding of vision-language models have permeated the machine learning ecosystem. Given an image, these benchmarks probe a model's ability to identify its associated caption amongst a set of compositional dist…

2022

ELIGN: Expectation Alignment as a Multi-Agent Intrinsic Reward

NeurIPS 2022accept

Modern multi-agent reinforcement learning frameworks rely on centralized training and reward shaping to perform well. However, centralized training and dense rewards are not readily available in the real world. Current multi-agent algorithms struggle to learn in the alternative setup of decentralize…