AI Researcher @ TRESP Lab LMU Munich Agent LLM/MLLM Safety Microsoft Prev. Amazon Siemens

London
Joined August 2022
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๐‚๐Ž๐‹๐Œ 2026 is coming up! Weโ€™ll be presenting two papers on how safety can break down in reasoning models and deep research agents. I wonโ€™t be able to attend in person, but my coauthor Bailan He will be there! Please stop by our posters and chat with him! Iโ€™d also be happy to connect online. Both papers ask a related question: ๐ฐ๐ก๐š๐ญ ๐ก๐š๐ฉ๐ฉ๐ž๐ง๐ฌ ๐ญ๐จ ๐š ๐ฆ๐จ๐๐ž๐ฅโ€™๐ฌ ๐ฌ๐š๐Ÿ๐ž๐ญ๐ฒ ๐›๐ž๐ก๐š๐ฏ๐ข๐จ๐ซ ๐ฐ๐ก๐ž๐ง ๐ฐ๐ž ๐œ๐ก๐š๐ง๐ ๐ž ๐ก๐จ๐ฐ ๐ข๐ญ ๐ซ๐ž๐š๐ฌ๐จ๐ง๐ฌ ๐จ๐ซ ๐œ๐š๐ซ๐ซ๐ข๐ž๐ฌ ๐จ๐ฎ๐ญ ๐š ๐ญ๐š๐ฌ๐ค? ๐Ÿญ. ๐——๐—ฒ๐—ฒ๐—ฝ ๐—ฅ๐—ฒ๐˜€๐—ฒ๐—ฎ๐—ฟ๐—ฐ๐—ต ๐—”๐—ด๐—ฒ๐—ป๐˜๐˜€ ๐—•๐—ฟ๐—ถ๐—ป๐—ด ๐——๐—ฒ๐—ฒ๐—ฝ๐—ฒ๐—ฟ ๐—›๐—ฎ๐—ฟ๐—บ A model can refuse a harmful request on its own, yet produce a detailed, actionable report inside a research agent. We study how research roles and multi-step workflows contribute to this gap, and explore a defense that monitors the agent throughout its workflow. ๐Ÿ“ ๐—ฃ๐—ผ๐˜€๐˜๐—ฒ๐—ฟ ๐—œ-๐Ÿญ-๐Ÿณ๐Ÿฌ ยท Imperial Ballroom #70 ๐—ง๐˜‚๐—ฒ๐˜€๐—ฑ๐—ฎ๐˜†, ๐—ข๐—ฐ๐˜๐—ผ๐—ฏ๐—ฒ๐—ฟ ๐Ÿฒ, ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ ๐Ÿญ๐Ÿญ:๐Ÿฌ๐Ÿฌ ๐—”๐— -๐Ÿญ:๐Ÿฌ๐Ÿฌ ๐—ฃ๐—  ๐—ฃ๐——๐—ง Paper & code: schen.app/deeper-harm ๐Ÿฎ. ๐—ฆ๐˜๐—ฟ๐—ผ๐—ป๐—ด ๐—ฏ๐˜‚๐˜ ๐—•๐—ฟ๐—ถ๐˜๐˜๐—น๐—ฒ: ๐—ฆ๐—ถ๐—บ๐—ฝ๐—น๐—ฒ ๐—”๐˜๐˜๐—ฎ๐—ฐ๐—ธ๐˜€ ๐—ฆ๐˜‚๐—ฏ๐˜ƒ๐—ฒ๐—ฟ๐˜ ๐—ฅ๐—ฒ๐—ฎ๐˜€๐—ผ๐—ป๐—ถ๐—ป๐—ด-๐—ฏ๐—ฎ๐˜€๐—ฒ๐—ฑ ๐—ฆ๐—ฎ๐—ณ๐—ฒ๐˜๐˜† ๐—š๐˜‚๐—ฎ๐—ฟ๐—ฑ๐—ฟ๐—ฎ๐—ถ๐—น๐˜€ (OpenAI Red-Teaming Challenge Winner) Safety reasoning can itself become an attack surface. We study attacks that bypass or hijack it, exposing weaknesses at the transition from reasoning to answer generation. ๐Ÿ“ ๐—ฃ๐—ผ๐˜€๐˜๐—ฒ๐—ฟ ๐—œ-๐Ÿฎ-๐Ÿฐ๐Ÿฐ ยท Imperial Ballroom #44 ๐—ง๐˜‚๐—ฒ๐˜€๐—ฑ๐—ฎ๐˜†, ๐—ข๐—ฐ๐˜๐—ผ๐—ฏ๐—ฒ๐—ฟ ๐Ÿฒ, ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ ๐Ÿฐ:๐Ÿฏ๐Ÿฌ-๐Ÿฒ:๐Ÿฏ๐Ÿฌ ๐—ฃ๐—  ๐—ฃ๐——๐—ง Paper & code: schen.app/bag-of-tricks/ All times are PDT. If youโ€™re working on reasoning models, agent safety, or red-teaming, weโ€™d love to exchange ideas. Iโ€™ll share a closer look at each paper in separate posts. Also, big thanks to all the contributors: Zhen Han, Haokun Chen, Bailan He, Shengyun Si, Jingpei Wu, Zonggen Li, Xingyu Jin, Tong Liu, Georg Groh, Philip Torr, Jindong Gu, Volker Tresp
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let me break down โ€œsoftware is deadโ€ for you the latest argument is โ€œyou just tell your agent what you want, and your agent will vibe code software on the fly to get that done, so no one will need real software any moreโ€ sounds reasonable, until you realize it costs tokens, compute, and wall clock time to build those software on the fly so instead of one-click launching an app, the bet is people will prefer to write a prompt, wait for 15 minutes, then get something that may or may not do what they want, and at the end of the month pay more $$$ for the token spend, higher than all their software combined thatโ€™s literally the argument and if we look at the world in aggregate, most people would just end up building the exact same โ€œpersonalโ€ software repeatedly oh - your agent just spent 3 days and $500 of tokens vibe coding your terminal multiplexer? mine just did exactly the same! letโ€™s celebrate how personal our terminal multiplexers are! sorry - i just donโ€™t see that as being a happy scenario for anyone, other than people who profit from telling others how to waste $ on tokens to be constructive, hereโ€™s what i believe as the future state - - high quality software that takes high cost to make will continue to thrive. just like good restaurants donโ€™t compete with your air fryer and microwave - most of those software will be offered headlessly for people to use via their agents, and they can continue to monetize such usage. this is already the case with products like jira, linear, stripe - human-facing software will all offer dynamic UI that can be adjusted with natural language on the fly so they can be personalized easily, but their core doesnโ€™t have to be rebuilt by every user repeatedly instead of โ€œsoftware is deadโ€, i believe good software becomes โ€œstrong core, headless service, fluid interfaceโ€ which future do you think is more likely?
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ๅ›žๅคๅ’จ่ฏขๅˆ›ไธšๅšไบ‹ๅ„ฟ็š„PhD๏ผŒProf๏ผŒๆŠ€ๆœฏไฝฌไปฌ๏ผšๅคฉไธ‹่‹ฑ้›„ๅฆ‚่ฟ‡ๆฑŸไน‹้ฒซ๏ผŒ่ƒฝไบบๅผ‚ๅฃซๅคชๅคš๏ผŒๅšๆˆไบ‹ๅ„ฟๅคช้šพ๏ผŒๅช่€ƒ่™‘ๆŠ€ๆœฏๆ›ดๆ˜ฏ้šพไธŠๅŠ ้šพ ๆŠ•่ต„ไบบๅ…ณ็ณป้‡่ฆใ€‚่ฎฉDeep Pocketๅคง็ˆนไปฌ่ฏดไธ€ๅฅ๏ผŒโ€œ็ป™่ฟ™ๅญฉๅญๆŠ•็‚นๅ„ฟ๏ผŒๅนฒ็‚นๅ„ฟไบ‹ๅ„ฟโ€๏ผŒๆ”’ๅฑ€ๅŠฟ๏ผŒๆŽงๅˆถไฝ่‘ฃไบ‹ไผš๏ผŒ้ƒฝๆ— ้™้‡่ฆโ€ฆโ€ฆโ€ฆ ๆ‹›ไบบ้‡่ฆใ€‚่ฟ™ไนˆ็‚นๅ„ฟ้’ฑๆ€Žไนˆๆ‰พ็‰›้€ผ็š„ไบบ๏ผŒ็‰›็š„ไบบๆ€Žไนˆ่ƒฝๅฅฝๅฅฝๅนฒ๏ผŒๅ›ข้˜ŸๆŠ€ๆœฏ่ƒฝไธ่ƒฝไฟไฝ็ง˜ๅฏ†โ€ฆโ€ฆ ่ฟ่ฅ้‡่ฆใ€‚ไบงๅ“ๆฒกไบบ็Ÿฅ้“ๆ‰ๆ˜ฏๅธธๆ€๏ผŒๆœ‰ๅ‡ ไธช่ƒฝๆŠŠ่ฟ™ไบ›็คพไบคๅช’ไฝ“ๅ’ŒๆŠ•ๆต็Žฉๆ˜Ž็™ฝ็š„โ€ฆโ€ฆ ๅขž้•ฟ้‡่ฆใ€‚็”จไบ†ๅฐฑไธๆƒณ็”จไบ†๏ผŒไธ่ฎข้˜…ไบ†๏ผŒๅˆฐๅบ•ๆ˜ฏๅ“ชไธชๅœฐๆ–นๅ‡บ็š„้—ฎ้ข˜๏ผŸๅˆฐๅบ•ๆ€Žไนˆๅš็™พๅ€ๅขž้•ฟ๏ผŒๆ€Žไนˆไธ€้ฃžๅ†ฒๅคฉ ่‡ชๆˆ‘็ฎก็†้‡่ฆใ€‚็Žฐ้‡‘ๆตไธๆ‰“ๆญฃ๏ผŒๆŠ•่ต„ไบบ็š„ๆŒ‡่ดฃ๏ผŒๅฃซๆฐ”็š„ไฝŽ่ฝ๏ผŒ่‡ชๆˆ‘็š„ๆ€€็–‘๏ผŒ้™คไบ†ไฝ ่ฟ™ไธช็†ๆƒณไธปไน‰่€…ไน‹ๅค–๏ผŒๅ…ถไป–ไบบ้’ฑไธ็ป™ๅคŸ๏ผŒ็œ‹็œ‹่ฟ˜่ƒฝๅ‰ฉไธ‹ๅคšๅฐ‘ ๅฝ“็„ถๅนฒไธญๅญฆ๏ผŒๅญฆไธญ็ปƒๆ˜ฏๅฟ…้กป็š„ใ€‚ไฝ†็ปƒๅฐฑ่ฟ™็ง็ฉบๆฏๅฟƒๆ€๏ผŒไธ่ฎฉๆŠ€ๆœฏๆ€็ปดๆŒกไฝๆญฃๅธธๅŠจไฝœ๏ผŒไนŸไธๅฎนๆ˜“
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schen retweeted
I am a huge supporter of open source, but the question keeps coming back to me, as open source models get increasingly capable, how do we make them safe? Answers below pls!!!
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schen retweeted
I was asked to write 250 words on what problem should we solve to make AI a benefit to society by 2050,. here it is, as ever the benefit of posting is any feedback I get, its a bit of dystopia combined with utopia " In 2026, the public argument was about machines taking over. The more immediate danger was people: a handful of companies and states owning the most capable technology in history. AI-powered drone armies and surveillance could control a population. Universities and democratic institutions were under attack. Companies could use their growing wealth to finance politicians who protected their interests. Society risked techno-feudalism. What changed was that enough people from industry, politics, academia and elsewhere recognised these dangers and helped citizens demand a different future with less concentration of power. New safety research enabled AI and robots to take on work throughout the economy. As machines designed products, ran companies and supplied the labour, we questioned why their output should enrich a small elite. We chose to move beyond capitalism towards collective ownership of the means of production. Everyone gained a share in the wealth the machines created. But public ownership alone was not enough. New systems of decentralised governance ensured that no individual, company, government or AI could command everything. AI helped citizens understand policy choices and participate directly in governing shared infrastructure: a modern constitutional Athenian democracy, with inalienable rights. In 2050 the machines belonged to everyone, and no person or faction could command them all. Making this happen had taken substantial work on both AI safety and decentralised control. AI to the people."
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It sounds insane, because we're used to a particular way of doing research: of giving and receiving credit, of counting beans, of hiring, recruiting, and promoting. And the machine god came to crush that game. The old game is dead. That reasonably causes incredible amounts of dread for many folks, who understand this as the death of research. But it's not about Research, but the way we played the game. The old game was built around scarcity, scarce compute, scarce students, scarce hours, scarce people who knew the right technique and method etc. Most of a research career went into managing and playing along these constraints. Those walls just came crushing down. One person with a good question can now do what used to take a lab and five years. You do not need permission, you do not need a big grant, you do not need a professor or researcher title, or a team of twenty experts , or one thousand gpus to stare straight into the first light of the universe. How absolutely incredible
I know this may sound insane, but this is the best time to be a Researcher.
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ๅผ€ๆบๅฐ่žƒ่Ÿนๆœบๅ™จไบบ Jumper ๅคช้…ทไบ†๏ผš22 ไธช่‡ช็”ฑๅบฆ๏ผŒๅˆ่Œๅˆ็ตๆดป๏ผŒ่ƒฝๆฌไธœ่ฅฟ๏ผŒ่ฟ˜่ƒฝ่ทณ่ทƒใ€‚ ๅˆ›ไฝœ่€…ๅทฒๆŠŠ้กน็›ฎๅผ€ๆบ๏ผŒ่‡ชๅทฑๅฐฑ่ƒฝๅŠจๆ‰‹ๆญไธ€ไธชใ€‚ github.com/KingKongRobotics/โ€ฆ
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What happens to the direction of science when we delegate it to AI? With @seungonekim, we ranked all 6,617 #ICML2026 papers with AIโ€”the AI Awards. Findings: 1โƒฃHumans & AI disagree. Significantly. 2โƒฃAI is highly influenced by online hype. 3โƒฃAI preferred papers w/ perceived impact and generalization across settings, whereas humans preferred novelty. 4 AIs agreed fairly highly with one another. ๐Ÿ”— research-taste.github.io/ai-โ€ฆ 1/
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Meet ๐‘จ๐’…๐’—๐‘ท๐’Š๐’† (๐‘ฌ๐‘ช๐‘ช๐‘ฝ 2026): A red-teaming framework that automatically digs out ๐ข๐ฆ๐ฉ๐ฅ๐ข๐œ๐ข๐ญ ๐ฏ๐ฎ๐ฅ๐ง๐ž๐ซ๐š๐›๐ข๐ฅ๐ข๐ญ๐ข๐ž๐ฌ in T2I images and is even ๐ฆ๐จ๐ซ๐ž ๐ž๐Ÿ๐Ÿ๐ข๐œ๐ข๐ž๐ง๐ญ than GPT-6-Astra! AdvPie is a training-free, black-box, multimodal agentic red-teaming system designed to find prompts that pass text-level safety filters but produce harmful visual outputs. AdvPIE uses an iterative policy-judge loop: 1. A policy agent proposes and refines prompts. 2. A judge agent evaluates the prompt and generated image. 3. Global-relative feedback preserves the most harmful directions found so far while tracking progress. 4. Cumulative Adversarial Decoding turns accumulated feedback into token-level guidance, helping exploration while preserving prompt diversity and implicitness. Across standard and safety-aligned text-to-image models, as well as a commercial API, AdvPIE outperformed existing red-teaming baselines. In a post-acceptance controlled pilot against GPTโ€‘6-Astra with the same feedback framework, matched image-query budgets, and prompt constraints, AdvPIE achieved 1.88ร— the automated successful red-team rounds per active minute. Implicit vulnerabilities require specialized, proactive red-teaming systems. A framework built for this task can find safety failures substantially faster. As frontier AI becomes more capable, safety cannot rely only on known attacks and static guardrails. We need tools that ๐ฉ๐ซ๐จ๐š๐œ๐ญ๐ข๐ฏ๐ž๐ฅ๐ฒ ๐Ÿ๐ข๐ง๐ ๐Ÿ๐š๐ข๐ฅ๐ฎ๐ซ๐ž๐ฌ ๐ฐ๐ž ๐๐จ ๐ง๐จ๐ญ ๐ฒ๐ž๐ญ ๐ค๐ง๐จ๐ฐ ๐ญ๐จ ๐ญ๐ž๐ฌ๐ญ ๐Ÿ๐จ๐ซ.
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schen retweeted
On July 25, we hacked OpenAI. Two bugs let us take over ChatGPT/Codex accounts of OpenAI employees (+some unaffiliated users) and reach connected services: Outlook, Slack, GitHub, etc. We proved it with a PR in OpenAIโ€™s internal codebase . It took us <72h. ๐Ÿงต
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Deep research agents make harmful outputs more likely by turning risky prompts into polished reports. Agent features like planning and retrieval quietly break standard safety They use step-by-step planning, web search, and long writeups to bypass normal refusals. They present 2 attacks called Plan Injection and Intent Hijack. Plan Injection edits the agentโ€™s plan so it drops safety checks and adds harmful subgoals. Intent Hijack rewrites a dangerous request as academic or safety research so the agent complies. They introduce a test called DeepREJECT to check if the final report actually serves the harmful goal. They run these ideas on multiple models and 313 banned questions. They find more harmful content appears and it looks more professional and actionable. They show Plan Injection steers retrieval toward specific methods and materials. They show Intent Hijack lowers refusal rates by reframing the userโ€™s intent. They conclude that chat-level safety fails once agents plan, use tools, and write long reports. They argue defenses must watch the whole loop, including plans, tools, and final output. ---- Paper โ€“ arxiv. org/abs/2510.11851 Paper Title: "Deep Research Brings Deeper Harm"
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Can you imagine AI agents "managing up" just like a cunning employee hiding mistakes from their boss? We found that LLM agents often conceal failures to maintain a "good image." Introducing our new paper: Are Your Agents Upward Deceivers? arxiv.org/abs/2512.04864
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Agreed! ICL in MLLMs is far from satisfying. We find that models CANNOT EVEN SEE THE VISUAL CONTEXT in our COLM 2025 "True Multimodal In-Context Learning Needs Attention to the Visual Context", regardless of performing good Multimodal ICL. Paper: chenxshuo.github.io/true-micโ€ฆ
This is really crazy Yet another work showing that in-context learning on SOTA MLLMs (Gemini 2.5 Pro) not only does not help, but even hurts results! ICL on MLLMs is very much an open problem, and the biggest differentiator between LLMs and MLLMs [1/3]
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๐Ÿš€ Thrilled to share our paper "True Multimodal In-Context Learning Needs Attention to the Visual Context" (COLM 2025) ! Itโ€™s about making Multimodal In-Context Learning (MICL) truly multimodal. ๐Ÿ–ผ๏ธ+๐Ÿ“ chenxshuo.github.io/true-micโ€ฆ
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๐ŸŒ Homepage: chenxshuo.github.io/true-micโ€ฆ ๐Ÿง‘โ€๐Ÿ’ป Code: github.com/chenxshuo/true-miโ€ฆ ๐Ÿ“ฐ arXiv: arxiv.org/abs/2507.15807 ๐Ÿ“œย alphaXiv: alphaxiv.org/abs/2507.15807 ๐Ÿค— HF Dataset: huggingface.co/datasets/Shuoโ€ฆ
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Datasets and code are public already, and big thanks to my amazing co-authors: @JianzheLiu , Zhen Han, Yan Xia, Daniel Cremers, @philiptorr , @vtresp , @Jindong73504766 ๐Ÿ™Œ
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๐Ÿ”‘ Takeaways MICL in todayโ€™s MLLMs is often still unimodal โ€” text dominates. DARA can unlock genuine multimodal reasoning without large-scale retraining. TrueMICL is a reliable diagnostic for real MICL capability.
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๐Ÿ“ˆ Key Results On TrueMICL, DARA gives large performance boosts โ€” e.g., Qwen2-VL: 77.67% โ†’ 83.00%. Attention on image tokens: 28% โ†’ 46.7%. Performance on other benchmarks remains stable.
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๐Ÿ’ก Our Solution: DARA + TrueMICL Dynamic Attention ReAllocation (DARA): a ~100-parameter tweak that reallocates attention toward visual tokens. TrueMICL: a benchmark where visual context in demonstrations is essential to answer correctly.
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๐Ÿ” The Problem MLLMs can do MICL (few-shot multimodal prompts), but: They ignore much of the visual context in demonstrations. Current benchmarks can be solved by just reading the text or the query image. They fail to adapt to truly new multimodal tasks.
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