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Zi-Xiang Chen

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#artificial intelligence Preprint Sep 2026

Salesforce Koa: An Enterprise Language Model for Agentic Tool Use

We present Salesforce Koa, an enterprise language model built by post-training the open-weight Nemotron-3-Super-120B foundation model with reinforcement learning using Group Relative Policy Optimization (GRPO), and deployed in FP8 for production. Koa is trained only on public and synthetically generated data, and speci...

Zi-Xiang Chen, Su-Feng Niu, Ying-Chieh Liu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

JarvisGUI: Towards Cross-Device GUI Agents with Dynamic Task Composition

JarvisGUI reveals that state-of-the-art open-source GUI agents struggle with the state-transfer awareness, cross-platform contextual reasoning, and long-horizon dependency management required for real-world workflows, exposing a critical capability gap invisible to existing benchmarks.

Zi-Xiang Chen, Yu-Heng Lu, Zihao Cheng et al. · 1 citation

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