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Alexander Toshev

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#artificial intelligence Preprint Oct 2026

LLM Value Functions for Credit Assignment in Agentic RL

Reinforcement learning (RL) for large language model (LLM) agents remains challenging in long-horizon tasks with sparse outcome rewards, where assigning credit to individual actions is difficult. Methods such as GRPO assign the same trajectory-level advantage to all actions, while critic-based methods require learning...

Kai-Jie Zhu, Wei-Xiang Yan, Omar Attia et al. · 0 citations
Jul 2026

Environment-free Synthetic Data Generation for API-Calling Agents

Training API-calling large language model (LLM) agents demands massive amounts of high-quality trajectories. However, collecting such data at scale typically requires fully implemented environments with executable APIs and realistic, pre-populated backend databases, creating a major bottleneck for scalability. To overc...

Seanie Lee, Sanjoy Chowdhury, Chao Jiang et al. · 2 citations

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