# Tencent — Stabilizing RLVR via Token-level Gradient Diagnosis and Layerwise Clipping

- Company: Tencent (tencent.com)
- Announced: 2026-02-13T08:36:03+00:00
- Category: research-paper
- Subject: Hunyuan
- Source: https://hunyuan.tencent.com/research/100015
- Record: https://forck.live/items/4581-stabilizing-rlvr-via-token-level-gradient-diagnosis-and-layerwise-clipping

Tencent presents GradLoc, a white-box diagnostic tool for localizing gradient spikes to specific culprit tokens in RLVR training, and proposes LayerClip for layerwise gradient clipping to improve training stability.

## Evidence

Verbatim from https://hunyuan.tencent.com/research/100015:

> We introduce GradLoc, an infrastructure tool

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Record: https://forck.live/items/4581-stabilizing-rlvr-via-token-level-gradient-diagnosis-and-layerwise-clipping
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