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Glen Berseth

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#artificial intelligence Preprint Sep 2026

GlyphBench: A Playground for Language-Model Reinforcement Learning

We introduce GlyphBench, an environment suite for reinforcement learning (RL) post-training of language-model agents, with over 360 tasks spanning diverse games. GlyphBench renders spatial observations as two-dimensional Unicode grids and connects training, evaluation, and trajectory replay through a unified interface...

Roger Creus Castanyer, Marc-Alexandre Côté, Matthew J. Sargent et al. · 0 citations
Jul 2026

SafeExplorer: An Unbiased Policy Gradient for Reinforcement Learning with Recovery Interventions

The resulting algorithm reduces training-time falls by factors of 233x, 48x, and 26x on HalfCheetah, Ant, and Unitree Go1 over standard PPO, while matching or exceeding PPO's final reward, and on Ant, where the recovery policy is unreliable, it is the only method that reaches 80% of the best final reward.

E. Daneshmand, Majid Khadiv, Glen Berseth et al. · 0 citations

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