Sample then Identify: A General Framework for Risk Control and Assessment in Multimodal Large Language Models
On the map: Multimodal LLMs / vision-language models → MLLM training and visual instruction tuning
Abstract (arXiv)
Multimodal Large Language Models (MLLMs) exhibit promising advancements across various tasks, yet they still encounter significant trustworthiness issues. Prior studies apply Split Conformal Prediction (SCP) in language modeling to construct prediction sets with statistical guarantees. However, these methods typically rely on internal model logits or are restricted to multiple-choice settings, which hampers their generalizability and adaptability in dynamic, open-ended environments. In this paper, we introduce TRON, a two-step framework for risk control and assessment, applicable to any MLLM that supports sampling in both open-ended and closed-ended scenarios. TRON comprises two main components: (1) a novel conformal score to sample response sets of minimum size, and (2) a nonconformity score to identify high-quality responses based on self-consistency theory, controlling the error rates by two specific risk levels. Furthermore, we investigate semantic redundancy in prediction sets within open-ended contexts for the first time, leading to a promising evaluation metric for MLLMs based on average set size. Our comprehensive experiments across four Video Question-Answering (VideoQA) datasets utilizing eight MLLMs show that TRON achieves desired error rates bounded by two user-specified risk levels. Additionally, deduplicated prediction sets maintain adaptiveness while being more efficient and stable for risk assessment under different risk levels.
Key facts. Cited by 18 papers in the map (data through 7 Oct 2026). Placed in MLLM training and visual instruction tuning, one of 16 directions in Multimodal LLMs / vision-language models. Builds on 39 of its 46 references that are in the map. First posted on arXiv 10 Oct 2024.
Builds on
39 of 46 references.
Closest ancestors · 3
Same direction, newest first
- 2024A Survey of Multimodal Large Language Model from A Data-centric Perspective26 May
- 2023Multimodal Large Language Models: A Survey22 Nov
- 2023NExT-GPT: Any-to-Any Multimodal LLM11 Sep
Other references · 36
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- 2024Answering from Sure to Uncertain: Uncertainty-Aware Curriculum Learning for Video Question Answeringcited by 2
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Citing papers per year: 2025: 12; 2026: 6.
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- 2025LEC: Linear Expectation Constraints for Selection-Conditioned Risk Control in Selective Prediction and Routing Systems1 Dec 2025
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