Can I run glm-4-9b-chat-IMat-GGUF on an RTX 5090?

Yes

Its BF16 file (18.8 GB) fits in the 28.8 GB an RTX 5090 can use, with room for ≈ 128K tokens of context.

ollama run hf.co/legraphista/glm-4-9b-chat-IMat-GGUF:BF16

Files and context on RTX 5090

Each file of glm-4-9b-chat-IMat-GGUF (and of GGUF versions the site has analyzed), and how much context fits next to it, with the context cache in 16-bit or 8-bit.

glm-4-9b-chat-IMat-GGUF on other hardware

Popular models that run on RTX 5090

Assumes 90% of the card's memory is usable and at least 4K tokens of context for one conversation, with the context cache in 16-bit unless noted. Fits leaves at least 20% of that memory for context; Tight leaves less.