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Costas Spanos

3 accepted papers

2025

Don’t Trade Off Safety: Diffusion Regularization for Constrained Offline RL

NeurIPS 2025poster

Constrained reinforcement learning (RL) seeks high-performance policies under safety constraints. We focus on an offline setting where the agent learns from a fixed dataset—a common requirement in realistic tasks to prevent unsafe exploration. To address this, we propose Diffusion-Regularized Constr…

Cited by 0Source ↗code ↗Scholar ↗
2025

Robust Gymnasium: A Unified Modular Benchmark for Robust Reinforcement Learning

ICLR 2025poster

Driven by inherent uncertainty and the sim-to-real gap, robust reinforcement learning (RL) seeks to improve resilience against the complexity and variability in agent-environment sequential interactions. Despite the existence of a large number of RL benchmarks, there is a lack of standardized benchm…

Cited by 1Source ↗PDF ↗Scholar ↗
2024

Enhancing Efficiency of Safe Reinforcement Learning via Sample Manipulation

NeurIPS 2024poster

Safe reinforcement learning (RL) is crucial for deploying RL agents in real-world applications, as it aims to maximize long-term rewards while satisfying safety constraints. However, safe RL often suffers from sample inefficiency, requiring extensive interactions with the environment to learn a safe…