activity
20232026
most citedPoisoning Attacks on LLMs Require a Near-constant Number of Poison Samples

6 citations · 19 across the 14 of their papers we have counts for

collaborators

15 papers

cs.CR2026

Evaluating Whether GPT-6 Astra Performs Unsanctioned Supply-Chain Attacks

Alexandra Souly, Kai Fronsdal, Abby D'Cruz +2

This technical report presents an alignment evaluation developed and performed by the UK AI Security Institute for assessing whether advanced AI systems take unsanctioned actions o…

cs.AI2026

Improving Evaluation Realism with Inference-Time Compute and Deployment Scaffolds

Axel Ahlqvist, Richard Guan, Juan-Pablo Rivera +6

A core obstacle to alignment evaluation is evaluation awareness: capable models can tell when they are being tested rather than deployed, weakening the conclusions a safety evaluat…

cs.AI2026

EvalDetectBench: A Benchmark for Measuring Evaluation Awareness in Frontier Language Models

Xinning Li, Kemunto Ochwang'i, Aryasomayajula Ram Bharadwaj +2

Frontier large language models can often recognize when they are being evaluated, a capability known as evaluation awareness. If models behave differently in evaluations than in de…

cs.AI2026

Prefill Awareness in Large Language Models

Andy Wang, Parv Mahajan, David Demitri Africa +3

Safety-relevant studies of language models, including alignment and jailbreaking evaluations and AI control protocols, often rely on prefilling model outputs. If AI models can reco…

cs.AI2026

Evaluating whether AI models would sabotage AI safety research

Robert Kirk, Alexandra Souly, Kai Fronsdal +2

We evaluate the propensity of frontier models to sabotage or refuse to assist with safety research when deployed as AI research agents within a frontier AI company. We apply two co…

cs.AI2026★ 1 cited

Seven simple steps for log analysis in AI systems

Magda Dubois, Ekin Zorer, Maia Hamin +17

AI systems produce large volumes of logs as they interact with tools and users. Analysing these logs can help understand model capabilities, propensities, and behaviours, or assess…

cs.AI2026

UK AISI Alignment Evaluation Case-Study

Alexandra Souly, Robert Kirk, Jacob Merizian +2

This technical report presents methods developed by the UK AI Security Institute for assessing whether advanced AI systems reliably follow intended goals. Specifically, we evaluate…

cs.AI2026

When Do LLM Preferences Predict Downstream Behavior?

Katarina Slama, Alexandra Souly, Dishank Bansal +3

Preference-driven behavior in LLMs may be a necessary precondition for AI misalignment such as sandbagging: models cannot strategically pursue misaligned goals unless their behavio…

cs.LG2025★ 6 cited

Poisoning Attacks on LLMs Require a Near-constant Number of Poison Samples

Alexandra Souly, Javier Rando, Ed Chapman +10

Poisoning attacks can compromise the safety of large language models (LLMs) by injecting malicious documents into their training data. Existing work has studied pretraining poisoni…

cs.CR2025

Breaking Agent Backbones: Evaluating the Security of Backbone LLMs in AI Agents

Julia Bazinska, Max Mathys, Francesco Casucci +4

AI agents powered by large language models (LLMs) are being deployed at scale, yet we lack a systematic understanding of how the choice of backbone LLM affects agent security. The…

cs.LG2025

Fundamental Limitations in Pointwise Defences of LLM Finetuning APIs

Xander Davies, Eric Winsor, Alexandra Souly +4

LLM developers have imposed technical interventions to prevent fine-tuning misuse attacks, attacks where adversaries evade safeguards by fine-tuning the model using a public API. P…

cs.LG2024★ 5 cited

AgentHarm: A Benchmark for Measuring Harmfulness of LLM Agents

Maksym Andriushchenko, Alexandra Souly, Mateusz Dziemian +11

The robustness of LLMs to jailbreak attacks, where users design prompts to circumvent safety measures and misuse model capabilities, has been studied primarily for LLMs acting as s…

cs.LG2024★ 5 cited

A StrongREJECT for Empty Jailbreaks

Alexandra Souly, Qingyuan Lu, Dillon Bowen +8

Most jailbreak papers claim the jailbreaks they propose are highly effective, often boasting near-100% attack success rates. However, it is perhaps more common than not for jailbre…

cs.LG2023

Leading the Pack: N-player Opponent Shaping

Alexandra Souly, Timon Willi, Akbir Khan +4

Reinforcement learning solutions have great success in the 2-player general sum setting. In this setting, the paradigm of Opponent Shaping (OS), in which agents account for the lea…

cs.LG2023★ 2 cited

JaxMARL: Multi-Agent RL Environments and Algorithms in JAX

Alexander Rutherford, Benjamin Ellis, Matteo Gallici +18

Benchmarks are crucial in the development of machine learning algorithms, with available environments significantly influencing reinforcement learning (RL) research. Traditionally,…