Papers by Matthieu Geist
Factually Consistent Summarization via Reinforcement Learning with Textual Entailment Feedback (2023.acl-long)
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Paul Roit, Johan Ferret, Lior Shani, Roee Aharoni, Geoffrey Cideron, Robert Dadashi, Matthieu Geist, Sertan Girgin, Leonard Hussenot, Orgad Keller, Nikola Momchev, Sabela Ramos Garea, Piotr Stanczyk, Nino Vieillard, Olivier Bachem, Gal Elidan, Avinatan Hassidim, Olivier Pietquin, Idan Szpektor
| Challenge: | Recent advances in abstractive summarization systems produce factually inconsistent text . this is emphasized in tasks like summarizing, which often produce inconsistent text with no input article . |
| Approach: | They use reinforcement learning to optimize for factual consistency and explore trade-offs . they use textual-entailment rewards to optimize the accuracy of the generated summaries . |
| Outcome: | The proposed method improves faithfulness, salience and conciseness of the generated summaries. |
Contrastive Policy Gradient: Aligning LLMs on sequence-level scores in a supervised-friendly fashion (2024.emnlp-main)
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Yannis Flet-Berliac, Nathan Grinsztajn, Florian Strub, Eugene Choi, Bill Wu, Chris Cremer, Arash Ahmadian, Yash Chandak, Mohammad Azar, Olivier Pietquin, Matthieu Geist
| Challenge: | Reinforcement Learning (RL) is a method used to fine tune Large Language Models (LLMs) using a reward model trained from preference data to better align with human judgment. |
| Approach: | They propose a Reinforcement Learning (RL) algorithm that can estimate the optimal policy even from off-policy data. |
| Outcome: | The proposed algorithm can estimate the optimal policy even from off-policy data. |