Q4_K_M · 4K context

Qwen3.8-Flash-Next MoE model with 125B total parameters and 6B active per token · estimated Q4_K_M memory about 108GB

Approximately 180B resident weight MoE model consisting of 125B core LMs (6B active) with 51B n-gram/PLE embeddings and 4B MTPs built into the architecture. The built-in 51B PLE embedding table is RAM offloadable and is independent of the Prompt Lookup speculative decoding that looks for repeated prompt phrases.

Estimated Q4_K_M memory
about 108GB
total parameters
125B
active parameter
6B
native context
256K

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Matching devices 29· 5 shown

Studio M5 Ultra 256GB

Comfortable fit · Q4_K_M · Headroom 81.0GB

₩19,250,000

115.0 ~ 172.6 tok/s

2× DGX Spark 256GB

Comfortable fit · Q4_K_M · Headroom 124.9GB

₩19,818,800

16.7 ~ 33.8 tok/s

Studio M3 Ultra 512GB

Comfortable fit · Q4_K_M · Headroom 372.9GB

₩25,000,000

50 ~ 70.3 tok/s

Studio M5 Ultra 512GB

Comfortable fit · Q4_K_M · Headroom 325.0GB

₩38,475,000

103.5 ~ 184.1 tok/s

RTX 5060 8GB

Can run · check speed · IQ2_XS · Headroom 0.0GB

₩1,863,585

33.5 ~ 73.9 tok/s

Price is the range midpoint, with a basic host added for GPU-only prices. Speed is an estimate for the same model and 4K input.

Running Guide

Qwen3.8-Flash-Next Local Serving Run Recipe

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