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Yu Yang
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@YuYang_i

Yu Yang

@YuYang_i
research @OpenAI 🍓 reasoning & data algorithms | BSc & PhD @UCLA 🐻 | Life’s all about taste.
San Francisco, CA
sites.google.com/view/yuyang090…
Joined April 2022
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  • @YuYang_i
    Yu Yang
    @YuYang_i
    Dec 16, 2025
    love the preset styles/prompts in the new ChatGPT Images! such a great way to experience how powerful ImageGen 1.5 is. got my holiday-style slack pfp in ONE CLICK and it looks so cinematic 🩵🥹 ImageGen 1.5 absolutely nails lighting, composition, and photorealism
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    @OpenAI
    OpenAI
    @OpenAI
    Dec 16, 2025
    Introducing ChatGPT Images, powered by our flagship new image generation model. - Stronger instruction following - Precise editing - Detail preservation - 4x faster than before Rolling out today in ChatGPT for all users, and in the API as GPT Image 1.5.
    13
  • @YuYang_i
    Yu Yang
    @YuYang_i
    Mar 1, 2025
    Sharing a little late update (before it’s no longer news): I wrapped up my PhD at the end of last year and recently joined @OpenAI’s reasoning team 🍓✨!
    114
  • @YuYang_i
    Yu Yang
    @YuYang_i
    Feb 10, 2025
    We released *DuoGuard*, a 0.5B multilingual guardrail model! Its two-player RL framework adversarially co-evolves a generator and classifier to generate safety data. DuoGuard offers fine-grained probabilities across 12 subcategories with customizable thresholds. Check it out! 🥳
    @Yihe__Deng
    Yihe Deng
    @Yihe__Deng
    Feb 10, 2025
    New paper & model release! Excited to introduce DuoGuard: A Two-Player RL-Driven Framework for Multilingual LLM Guardrails, showcasing our new DuoGuard-0.5B model. - Model: huggingface.co/DuoGuard/DuoGu… - Paper: arxiv.org/abs/2502.05163 - GitHub: github.com/yihedeng9/DuoG… Grounded in a
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  • @YuYang_i
    Yu Yang
    @YuYang_i
    Dec 10, 2024
    Finally out! 🎉 Are AI coding assistants like @cursor_ai, @GitHubCopilot, @codeiumdev, and @QodoAI helping you write secure code—or adding risks? With SecCodePLT, a platform for #codegen security from our recent research, we assessed insecure coding risks. Check out our blog! 😊
    This Post is from an account that no longer exists. Learn more
  • @YuYang_i
    Yu Yang
    @YuYang_i
    Dec 9, 2024
    1/ I'll be at #NeurIPS2024 presenting our work SmallToLarge (S2L): Data-efficient Fine-tuning of LLMs! 🚀 What’s S2L? It’s a scalable data selection method that trains a small proxy model to guide fine-tuning for larger models, reducing costs while preserving performance. 👇
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