How much VRAM does Kimi K2.5 need?

Kimi K2.5 (1000B parameters) requires approximately 619.4 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 RX 7900 XT 20GB provides.

FWon't run

Too heavy

Using Q4_K_M in vLLM

Capabilities:

Fit status

Too heavy

Decode

2.9 tok/s

TTFT

66757 ms

Safe context

Memory

619.4 GB / 20.0 GB

Weights610.0 GB

KV Cache5.0 GB

Runtime2.4 GB

Headroom2.0 GB

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	F	Too heavy	2.4 tok/s	116521 ms	4K
Chat	F	Too heavy	2.4 tok/s	43696 ms	4K
Coding	F	Too heavy	2.9 tok/s	66757 ms	4K
RAG	F	Too heavy	2.4 tok/s	145652 ms	4K
Reasoning	F	Too heavy	2.4 tok/s	94674 ms	4K

How Kimi K2.5 (1000B params) fits at each quantization level on RX 7900 XT 20GB (20.0 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