Qwen3.8-Flash-Next, strix-flash mix A (GGUF)

Quantized weights of Qwen/Qwen3.8-Flash-Next for local serving on AMD Strix Halo (Ryzen AI Max, gfx1151) with Halocpp. They are made for, and tested with, the strix-flash engine that Halocpp runs for this model.

./halocpp pull qwen3.8-flash-next
./halocpp serve qwen3.8-flash-next          # OpenAI-compatible API on 127.0.0.1:52625

Files

file bytes sha256
LICENSE 3,235 a0dc422560841fd68e06d974907f8b4c709bca44a67daad2b528437bdf676c08
mtp-Qwen3.8-Flash-Next-shared-Q8_0.gguf 2,786,568,256 5ff54097406a905cf3a724c709124ceb0e3e10235ee862298969e91c96fa96e6
Qwen3.8-Flash-Next-strixflash-mixA-00001-of-00006.gguf 375,531,936 ac483373b2c194c2ed73e3d428a6c577dc294fc54e877972db033697ce10aa3e
Qwen3.8-Flash-Next-strixflash-mixA-00002-of-00006.gguf 28,800,138,432 0e9027aa7de4817c91b5954039b563484466392e29a6b051b096f9c47a71a1c6
Qwen3.8-Flash-Next-strixflash-mixA-00003-of-00006.gguf 19,790,357,632 5e1d95f7a3e6a60e9b7da64beea5b289228edc4cd97341509e93592b8ee9a65b
Qwen3.8-Flash-Next-strixflash-mixA-00004-of-00006.gguf 19,608,645,248 64f0284324de3f8e0fa15856cfc575b9d5a261ce399a6c9d2fd3ca596a36acf6
Qwen3.8-Flash-Next-strixflash-mixA-00005-of-00006.gguf 19,719,695,840 93a0d6ee5205363965d9965c8a5c072241fe6a5141fc9fff12fab74690531fc5
Qwen3.8-Flash-Next-strixflash-mixA-00006-of-00006.gguf 4,103,658,848 ce1ce2d8bb8e73f761694768d5dc5edef1270a8bb960dd6515f9aa1086b24c9d
tokenizer/chat_template.jinja 8,952 c3cf9e34abf4f9e36c2d72165aa9c132d3e2a725b6c2586aaa3a8af9d7a81041
tokenizer/config.json 4,745 889658f2508e8c61d409b02e70e0d78d8d4452ec65aaafbe129805d213d2e74b
tokenizer/generation_config.json 202 e70c136c1b78ddc1fb0905bac8e733a4dc448d4f852a5dd75143fffc70be550e
tokenizer/tokenizer_config.json 17,928 b11349aafa7cdc6a320767cf7ceb29ed82f7eda5d65e8e0819e76f0ce947bf27
tokenizer/tokenizer.json 12,809,320 0997f410c57a1f4e53b09e4be8f4a172d90edd9564368fb0847030937229b9f3

Qwen3.8-Flash-Next-strixflash-mixA-*.gguf is one model split into GGUF shards with llama.cpp's llama-gguf-split (load the first shard; the others are found by name). SHA256SUMS lists every file.

How mix A was made

Starting from unsloth's UD-IQ4_XS GGUF of the model (unsloth/Qwen3.8-Flash-Next-GGUF, revision 38bb39ee97821de2c9009abb7e93950eec396e66), the dense trunk was re-quantized with GPTQ; the routed experts are kept as published:

tensors format
DeltaNet input projections, attention q / k / v Q5_0, GPTQ
DeltaNet output, shared experts, LM head IQ4_NL, GPTQ
hyper-connections, attention output Q8_0
routed experts as published: IQ3_S gate / up, IQ4_NL down (Q8_0 in 5 layers)

GPTQ used Hessians collected by the engine from 48 calibration sequences, alternating wikitext-2 test text beyond its first 100,000 tokens and C/C++ source code, so the calibration text is disjoint from the perplexity evaluation below. About 4.4 GB of weights are read per decoded token.

mtp-Qwen3.8-Flash-Next-shared-Q8_0.gguf is the model's multi-token-prediction block, used as the draft head for speculative decoding; it is unsloth's file, unchanged. The tokenizer/ files are the base model's, unchanged (revision de4b8e4d43b917e7706784d8bb445c9af86a3540).

Accuracy

Perplexity on 32,704 wikitext-2 test tokens (64 sequences of 512, decode path): measurement pending.

License

These weights are a derivative of Qwen3.8-Flash-Next and are distributed under the Qwen Community License 1.0, included as LICENSE. Its conditions apply to every use of these files.

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