# Z.ai 揭晓 Ox Alpha 实为 GLM-5.3-Flash

- 来源：Rohan Paul (@rohanpaul_ai)
- 发布时间：2026-08-26 23:32
- AIHOT 分数：49
- AIHOT 链接：https://aihot.news/items/cmta9qb4g07q0roj2kdig35j6
- 原文链接：https://x.com/rohanpaul_ai/status/2092636186808553596

## AI 摘要

Z.ai 证实此前神秘模型 Ox Alpha 实为 GLM-5.3-Flash，其每日 100 万亿 token 的流量由数万块国产 AI 芯片支撑，而非 NVIDIA GPU 集群。

## 正文

Finally, Z .ai revealed that Ox Alpha was actually GLM-5.3-Flash.
So that means over the last few days all those 100 tn tokens/day of stealth traffic capacity was running on Chinese AI chips, with tens of thousands of domestic accelerators behind the service. not an NVIDIA GPU cluster.

5.3-Flash beats GLM-5.2 at one-tenth the price with only 18B active parameters.

GLM-5.3-Flash. has 320B params in total, but only 18B are active during inference.

It also uses 45 layers instead of GLM-4.5's 92, cutting the amount of work required for each token.

The benchmark jumps are large too: against GLM-5.2, DeepSWE rises from 46.2 to 63.4 and AutomationBench from 26.2 to 48.8.

There is an architectural change as well, that cuts attention compute 3x and per-layer KV cache 4.4x versus GLM-5.3.

The novelty is mainly in the combination: GLM-5.3-Flash uses linear attention for cheap state tracking, then sparse attention with a lightweight indexer to retrieve only the distant context worth revisiting, instead of repeatedly attending across the full 1M-token window. They also introduces IndexPool, which compresses four indexer key vectors into one, and says the combined design

### 引用推文

> Rohan Paul：OxAlpha is a new iteration of GLM, from China’s Z .ai And it will change how you run long running agent fast. --- bloomberg .com/news/articles/2026-08-26/china-...