> Is there a reason they chose glm and not deepseek

GLM-5.3's architecture (same as GLM-5.2) is simpler and it came out earlier.

Hybrid attention and Manifold-Constrained Hyper-Connections only arrived with GLM-5.3-Flash.

Also, NVIDIA acquired HuggingFace, who used GLM-5.2 for their forensic analysis when they got hacked, so I presume that they have more familiarity with that model.

And DeepSeek-V4.1-Flash is more memory-efficient, so it'd sell fewer GPUs.