Yapei Chang

@yapeichang.bsky.social

☁️ phd in progress @ UMD | 🔗 https://lilakk.github.io/

🤔 Can simple string-matching metrics like BLEU rival reward models for LLM alignment? 🔍 We show that given access to a reference, BLEU can match reward models in human preference agreement, and even train LLMs competitively with them using GRPO. 🫐 Introducing BLEUBERI:

🕵️‍♀️ agents are strong on many tasks, but are they good at interacting with the web? 🧸our BEARCUBS benchmark shows that they struggle on interactive tasks that seem trivial to humans! 📄 check out the paper for how to build robust evaluations & directions for future agent research

Yixiao Song@yixiaosong.bsky.social · last yr.

Introducing 🐻 BEARCUBS 🐻, a “small but mighty” dataset of 111 QA pairs designed to assess computer-using web agents in multimodal interactions on the live web! ✅ Humans achieve 85% accuracy ❌ OpenAI Operator: 24% ❌ Anthropic Computer Use: 14% ❌ Convergence AI Proxy: 13%

Is the needle-in-a-haystack test still meaningful given the giant green heatmaps in modern LLM papers? We create ONERULER 💍, a multilingual long-context benchmark that allows for nonexistent needles. Turns out NIAH isn't so easy after all! Our analysis across 26 languages 🧵👇

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People often claim they know when ChatGPT wrote something, but are they as accurate as they think? Turns out that while general population is unreliable, those who frequently use ChatGPT for writing tasks can spot even "humanized" AI-generated text with near-perfect accuracy 🎯

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🚨I too am on the job market‼️🤯 I'm searching for faculty positions/postdocs in multilingual/multicultural NLP, vision+language models, and eval for genAI! I'll be at #NeurIPS2024 presenting our work on meta-evaluation for text-to-image faithfulness! Let's chat there! Papers in🧵, see more: saxon.me

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I noticed a lot of starter packs skewed towards faculty/industry, so I made one of just NLP & ML students: go.bsky.app/vju2ux Students do different research, go on the job market, and recruit other students. Ping me and I'll add you!

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Mat is not on 🦋—posting on his behalf! It's time to revisit common assumptions in IR! Embeddings have improved drastically, but mainstream IR evals have stagnated since MSMARCO + BEIR. We ask: on private or tricky IR tasks, are rerankers better? Surely, reranking many docs is best?

A plot showing that reranking improves recall as we increase the number of reranked docs, but with increasing docs we diminishing returns and eventually a performance dip.

The soul-searching journey for figuring out what research area is right for you is tricky since so many papers are cool. I tell my early career students that they should try to differentiate papers that they'd like to read 📖, implement 🔨, *and* write 📝 from papers that they'd only like to read 📖.

I really wanted to run NEW #nocha benchmark claims on #o1 but it won't behave 😠 - 6k reasoning tokens is often not enough to get an ans and more means being able to process only short books - OpenAI adds sth to the prompt: ~8k extra tokens-> less room for book+reason+generation!

Image showing prompt token count as per the tokenizer (tiktoken) which is 117,609 tokens, and as per what openai API claims it to be, which is 125,385 tokens. There is about 7000 extra tokens added coming from who knows where.

Looking forward to catching up with old and new friends at #EMNLP2024! I’m on the academic job market so please reach out if you would like to chat 🙏 And come talk to me, @rnv.bsky.social and @iaugenstein.bsky.social on Thu (Nov 14) at poster session G from 2-3:30PM about LLM tropes!

Dustin Wright@dustinbwright.com · 2y ago

At #EMNLP2024 we will present our paper on LLM values and opinions! We introduce tropes: repeated and consistent phrases which LLMs generate to argue for political stances. Read the paper to learn more! arxiv.org/abs/2406.19238 Work done Uni Copenhagen + Pioneer Center for AI