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Christian K. Belardi

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#artificial intelligence Preprint Sep 2026

PhantomEnvironments: Training LLM Agents in Fictional Worlds

Training LLM agents with reinforcement learning (RL) is bottlenecked by environments, which must provide verifiable rewards, support long-horizon interaction, and scale cheaply. Existing approaches rely on costly human-curated data or on LLM-generated environments that risk hallucinations and benchmark contamination. W...

Anmol Kabra, Swathi Saravana Selvam, Albert Gong et al. · 0 citations
#artificial intelligence Preprint Sep 2026

MoRE: Mixture of Reused Experts

Experiments show that MoRE consistently achieves lower perplexity and stronger downstream performance than standard MoEs and state-of-the-art weight-sharing architectures at matched compute and parameter budgets, with only minimal modifications to existing MoE implementations.

Eric S. Qiu, U. U. Acikalin, Justin Lovelace et al. · 1 citation
#machine learning Preprint Aug 2026

Optimize Your Sampling: Tuned Diffusion Sampling with Bayesian Optimization

Optizing Your Sampling (OYS), which instead treats timestep selection as a black-box optimization problem, optimizing the target metric directly with Bayesian optimization, improves both simple and sophisticated samplers such as Euler and DPM-Solver++.

Travis Zhang, Christian K. Belardi, Justin Lovelace et al. · 0 citations

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