How much VRAM does Kimi K2.5 need?

Kimi K2.5 (1000B parameters) requires approximately 619.0 GB of memory with Q4_K_M quantization.

What is the best quantization for Kimi K2.5?

The recommended quantization for Kimi K2.5 is Q4_K_M, which balances quality and memory efficiency.

Can it run?

No, Kimi K2.5 requires more memory than RTX 5080 16GB provides.

FWon't run

Too heavy

Using Q4_K_M in vLLM

Capabilities:

Fit status

Too heavy

Decode

3.1 tok/s

TTFT

61622 ms

Safe context

Memory

619.0 GB / 16.0 GB

Weights610.0 GB

KV Cache5.0 GB

Runtime2.4 GB

Headroom1.6 GB

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	F	Too heavy	3.5 tok/s	80918 ms	4K
Chat	F	Too heavy	3.1 tok/s	33612 ms	4K
Coding	F	Too heavy	3.1 tok/s	61622 ms	4K
RAG	F	Too heavy	3.1 tok/s	112040 ms	4K
Reasoning	F	Too heavy	3.1 tok/s	72826 ms	4K

How Kimi K2.5 (1000B params) fits at each quantization level on RTX 5080 16GB (16.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	390.0 GB	Low	F0
Q3_K_S	3	490.0 GB	Low	F0
NVFP4	4