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Rishabh Tiwari
135 posts
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Rishabh Tiwari
@rish2k1
CS PhD @UCBerkeley | Ex-Deepmind, FAIR | Research area: Efficient LLM reasoning, scaling RL
Berkeley, CA
rishabhtiwari.ai
Joined May 2019
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  • Pinned
    user avatar
    Rishabh Tiwari
    @rish2k1
    May 13
    Very excited about this line of research of fast-slow learning, 1) potential to solve a lot of issues with current RL (eg. entropy collapse, sparse rewards) 2) an intuitive way of incorporating rich feedback with RL 3) provides a way to transfer knowledge of text-only based
    user avatar
    Kusha Sareen
    @KushaSareen
    May 13
    Can LLMs adapt continually without losing base skills? Fast-Slow Training (FST) pairs "slow" weights with "fast" context. FST vs. RL: • 3x more sample-efficient • Higher performance ceiling • Less KL drift (better plasticity) • Continual learning: succeeds where RL stalls
    00:00
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  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jun 9, 2024
    Excited to share that I will be joining @UCBerkeley as a PhD student this Fall. I wish to continue working on the efficiency and interpretability of deep learning models, hoping to deepen our understanding of these systems.
    79K
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jul 31, 2023
    🚨 Excited to share our #ICML2023 work on the Feature Sieve, by which we automatically identify and suppress irrelevant or spurious features in deep networks, hence mitigating simplicity bias. Paper: openreview.net/pdf?id=DnTVBs6…
    GIF
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  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jan 9, 2024
    What a way to end my #WACV2024. Got a chance to chat (turned to short AMA 😅) with amazing and super humble @CSProfKGD. Hope you get a chance to tick off visiting India from your bucket list soon. @AditayTripathi @sourabhgothe
    7.2K
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jun 9, 2024
    Replying to @rish2k1
    PS cross posting my LinkedIn post in the hopes of expanding my X network (first step towards becoming a serious AI researcher😅).
    4.9K
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jun 9, 2024
    Replying to @rish2k1
    This accomplishment would not have been possible without the guidance from my incredible mentors: @doktorshenoy, @jainprateek_, @divy93t, @ManishGuptaMG1, @DjDvij.
    5.4K
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jan 5, 2024
    A very interesting paper by my good friend @rach_it_ w/ @GoogleAI and @GoogleDeepMind . Shows the strategy to compose different LLMs to unlock new capabilities. Seems like a critical step in the right direction towards practical usability of LLMs.
    user avatar
    Rachit Bansal
    @rach_it_
    Jan 5, 2024
    Extending an LLM for new knowledge sources is tedious—fine-tuning is expensive/causes forgetting, LoRA is restrictive. Excited to share our work where we show that an LLM can be efficiently *composed* with specialized (L)LMs to enable new tasks! arxiv.org/abs/2401.02412 🧵(1/8)
    The title of our paper: "LLM Augmented LLMs: Expanding Capabilities through Composition". All authors: "Rachit Bansal, Bidisha Samanta, Siddharth Dalmia, Nitish Gupta, Shikhar Vashishth, Sriram Ganapathy, Abhishek Bapna, Prateek Jain, Partha Talukdar", and their affiliations: Google Research, India and Google DeepMind.

Figure shows an overview of our framework: To augment an anchor LLM (mB) with new capabilities through composition with a specialized augmenting model (mA). Figure illustrates three mA with different
capabilities: key-value mapping (left), low-resource languages (center), and code (right). Models mA and mB remain unchanged during composition. A few additional parameters are learnt over models’ layer representations.
    2.1K
  • user avatar
    Rishabh Tiwari
    @rish2k1
    May 3, 2024
    A new benchmark dataset to evaluate LLMs on indic languages!
    user avatar
    Harman Singh @ ICML 🇰🇷🇰🇷
    @Harman26Singh
    May 3, 2024
    IndicGenBench is now released on huggingface: huggingface.co/collections/go…
    2.6K
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jul 31, 2023
    Replying to @rish2k1
    (8/8) Joint work with @doktorshenoy (Google Research India). @GoogleAI @GoogleIndia
    564
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jul 31, 2023
    Replying to @rish2k1
    (7) Optimization: We use accuracy on validation set for setting hparams. We require no knowledge of potential spurious attribute dimensions, nor even a curated / balanced validation set. Of course, well-chosen validation data can be exploited to guide the resulting classifier.
    654
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jul 31, 2023
    Replying to @rish2k1
    (5) Hypothesis: Simple features are learned early, lower in the network, and proliferate through the rest of the network. What if we can automatically identify and suppress such features?
    296
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    Rishabh Tiwari
    @rish2k1
    Jul 31, 2023
    Replying to @rish2k1
    (2) Problem: Simplicity bias: Models depend on weak, easily computed predictive features even if stronger alternatives exist. Spurious correlations: DNNs latch onto apparent feature-label correlations present in biased training data distributions.
    692
  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jul 31, 2023
    Replying to @rish2k1
    (3) Results (quant): SIFER gives around 65.7% accuracy without access to test distribution outperforming other baselines. Using a validation set drawn from test distribution further improves accuracy by 6.3%. SIFER beats SOTA by significant margins across debiasing benchmarks.
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  • user avatar
    Rishabh Tiwari
    @rish2k1
    Jul 31, 2023
    Replying to @rish2k1
    (6) Workflow: We alternate between identifying simple features (i.e., reading them out from intermediate network layers), and erasing them in lower layers. This simple yet powerful scheme mediates between (“sieves through”) competing features, picking only those that generalize.
    GIF
    315