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Skander Moalla

4 accepted papers

2025

Quantile Reward Policy Optimization: Alignment with Pointwise Regression and Exact Partition Functions

NeurIPS 2025poster

Aligning large language models with pointwise absolute rewards has so far required online, on-policy algorithms such as PPO and GRPO. In contrast, simpler methods that can leverage offline or off-policy data, such as DPO and REBEL, are limited to learning from preference pairs or relative signals. T…

Cited by 0SourceScholar
2024

Building on Efficient Foundations: Effective Training of LLMs with Structured Feedforward Layers

NeurIPS 2024poster

State-of-the-art results in large language models (LLMs) often rely on scale, which becomes computationally expensive. This has sparked a research agenda to reduce these models’ parameter counts and computational costs without significantly impacting their performance. Our study focuses on transform…

2024

No Representation, No Trust: Connecting Representation, Collapse, and Trust Issues in PPO

NeurIPS 2024poster

Reinforcement learning (RL) is inherently rife with non-stationarity since the states and rewards the agent observes during training depend on its changing policy. Therefore, networks in deep RL must be capable of adapting to new observations and fitting new targets. However, previous works have obs…

2023

SMACv2: An Improved Benchmark for Cooperative Multi-Agent Reinforcement Learning

NeurIPS 2023poster

The availability of challenging benchmarks has played a key role in the recent progress of machine learning. In cooperative multi-agent reinforcement learning, the StarCraft Multi-Agent Challenge (SMAC) has become a popular testbed for centralised training with decentralised execution. However, aft…