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Chenglei Si

17 accepted papers

2026

The Ideation-Execution Gap: Execution Outcomes of LLM-Generated versus Human Research Ideas

ICLR 2026poster

Large Language Models (LLMs) have shown promise in accelerating the scientific research pipeline. A key capability for this process is the ability to generate novel research ideas, and prior studies have found settings in which LLM-generated research ideas were judged as more novel than human-expert…

Cited by 0SourcecodeScholar
2026

Towards Execution-Grounded Automated AI Research

ICML 2026poster

Automated AI research holds great potential to accelerate scientific discovery. However, current LLMs often generate plausible-looking but ineffective ideas. Execution grounding may help, but it is unclear whether automated execution is feasible and whether LLMs can learn from the execution feedback…

Cited by 0SourceScholar
2025

Can LLMs Generate Novel Research Ideas? A Large-Scale Human Study with 100+ NLP Researchers

ICLR 2025poster

Recent advancements in large language models (LLMs) have sparked optimism about their potential to accelerate scientific discovery, with a growing number of works proposing research agents that autonomously generate and validate new ideas. Despite this, no evaluations have shown that LLM systems can…

2025

Contextual Experience Replay for Self-Improvement of Language Agents

ACL 2025long

Large language model (LLM) agents have been applied to sequential decision-making tasks such as web navigation, but without any environment-specific experiences, they often fail in these complex tasks. Moreover, current LLM agents are not designed to continually learn from past experiences during in…

Cited by 0SourcePDFScholar
2025

Design2Code: Benchmarking Multimodal Code Generation for Automated Front-End Engineering

NAACL 2025long

Generative AI has made rapid advancements in recent years, achieving unprecedented capabilities in multimodal understanding and code generation. This can enable a new paradigm of front-end development in which multimodal large language models (MLLMs) directly convert visual designs into code impleme…

2025

Position: Towards Bidirectional Human-AI Alignment

NeurIPS 2025poster

Recent advances in general-purpose AI underscore the urgent need to align AI systems with human goals and values. Yet, the lack of a clear, shared understanding of what constitutes "alignment" limits meaningful progress and cross-disciplinary collaboration. In this position paper, we argue that the…

Cited by 0SourceScholar
2025

Predicting Empirical AI Research Outcomes with Language Models

NeurIPS 2025poster

Many promising-looking ideas in AI research fail to deliver, but their validation takes substantial human labor and compute. Predicting an idea's chance of success is thus crucial for accelerating empirical AI research, a skill that even expert researchers can only acquire through substantial experi…

Cited by 0SourceScholar
2025

SPHERE: An Evaluation Card for Human-AI Systems

ACL 2025finding

In the era of Large Language Models (LLMs), establishing effective evaluation methods and standards for diverse human-AI interaction systems is increasingly challenging. To encourage more transparent documentation and facilitate discussion on human-AI system evaluation design options, we present an…

2024

Large Language Models Help Humans Verify Truthfulness – Except When They Are Convincingly Wrong

NAACL 2024long

Large Language Models (LLMs) are increasingly used for accessing information on the web. Their truthfulness and factuality are thus of great interest. To help users make the right decisions about the information they get, LLMs should not only provide information but also help users fact-check it. We…

Cited by 36SourcePDFScholar
2023

Getting MoRE out of Mixture of Language Model Reasoning Experts

EMNLP 2023long findings

While recent large language models (LLMs) improve on various question answering (QA) datasets, it remains difficult for a single model to generalize across question types that require distinct reasoning abilities. We provide empirical evidence that state-of-the-art LLMs suffer from poor generalizabi…

Cited by 0SourceScholar
2023

Ignore This Title and HackAPrompt: Exposing Systemic Vulnerabilities of LLMs Through a Global Prompt Hacking Competition

EMNLP 2023long main

Large Language Models (LLMs) are increasingly being deployed in interactive contexts that involve direct user engagement, such as chatbots and writing assistants. These deployments are increasingly plagued by prompt injection and jailbreaking (collectively, prompt hacking), in which models are manip…

Cited by 0SourceScholar
2023

Measuring Inductive Biases of In-Context Learning with Underspecified Demonstrations

ACL 2023long

In-context learning (ICL) is an important paradigm for adapting large language models (LLMs) to new tasks, but the generalization behavior of ICL remains poorly understood. We investigate the inductive biases of ICL from the perspective of feature bias: which feature ICL is more likely to use given…

2023

Prompting GPT-3 To Be Reliable

ICLR 2023poster

Large language models (LLMs) show impressive abilities via few-shot prompting. Commercialized APIs such as OpenAI GPT-3 further increase their use in real-world language applications. However, the crucial problem of how to improve the reliability of GPT-3 is still under-explored. While reliability i…

2023

READIN: A Chinese Multi-Task Benchmark with Realistic and Diverse Input Noises

ACL 2023long

For many real-world applications, the user-generated inputs usually contain various noises due to speech recognition errors caused by linguistic variations or typographical errors (typos). Thus, it is crucial to test model performance on data with realistic input noises to ensure robustness and fair…

2022

Re-Examining Calibration: The Case of Question Answering

EMNLP 2022finding

For users to trust model predictions, they need to understand model outputs, particularly their confidence — calibration aims to adjust (calibrate) models’ confidence to match expected accuracy. We argue that the traditional calibration evaluation does not promote effective calibrations: for example…

2021

What’s in a Name? Answer Equivalence For Open-Domain Question Answering

EMNLP 2021main

A flaw in QA evaluation is that annotations often only provide one gold answer. Thus, model predictions semantically equivalent to the answer but superficially different are considered incorrect. This work explores mining alias entities from knowledge bases and using them as additional gold answers…

2020

CharBERT: Character-aware Pre-trained Language Model

COLING 2020main

Most pre-trained language models (PLMs) construct word representations at subword level with Byte-Pair Encoding (BPE) or its variations, by which OOV (out-of-vocab) words are almost avoidable. However, those methods split a word into subword units and make the representation incomplete and fragile.…