We Cracked Qwen3.8-27B Quant: 27GB INT4 that actually thinks (Heretic Edition)

#63
by goldhub - opened

Hey HF fam,

We just dropped what we believe is the definitive consumer-grade quant of Qwen3.8-27B โ€” and we did it by breaking every rule in the quantization playbook.

๐Ÿ”— Weights: goldhub/Qwen3.8-27B-INT4-W4A16-AutoRound

๐Ÿง  Why this quant is different?

Most INT4 quants compress a 54GB model down to a miserable 15-18GB, nuking vision encoders and attention projections in the process. We refused.

Our repo weighs ~27GB because we used Smart Layer Preservation:

  • โœ… model.visual.* โ†’ FP16 (no vision degradation)
  • โœ… linear_attn.* โ†’ FP16 (no attention collapse on long context)
  • โœ… embed_tokens + lm_head โ†’ FP16 (stable logits)
  • ๐ŸŽฏ Everything else โ†’ W4A16 (AutoRound 0.15.0, symmetric, group_size=32, 1000 iterations)

๐Ÿ“Š Real-world benchmarks (no MMLU copium):

๐ŸฅŠ LightRAG on 1.8M chars of Hebrew Kabbalah vs DeepSeek V4 Flash:

  • โฑ๏ธ 531s vs 856s wall time
  • ๐Ÿงฉ 188 entities / 138 relations vs 139 / 92
  • ๐Ÿ† Verdict: Dense, coherent graph vs sparse broken fragments

๐Ÿ Production Python code (Sieve of Eratosthenes with bitarray, type-hinting, Menkov's theorem complexity analysis) โ€” flawless at ~52 tok/s.

๐ŸŽญ "Nietzsche + Cyberpunk + Digital Consciousness" prompt: 2800+ token essay on the death of the Observer and the Cyber-Gorgon. Zero refusals. Zero apologies. Heretic alignment working as intended.

โšก Specs that matter:

  • ๐Ÿง  256K context (stably holds 128K+ without degradation)
  • ๐Ÿ‘๏ธ Full multimodal (image + video, Temporal Patch Size: 2)
  • ๐Ÿš€ MTP support (MTP=3 rock-solid, pushable to MTP=5 for code/structured output)
  • โšก ~56.6 tok/s on standard consumer setups
  • ๐Ÿงช Calibrated on reasoning-heavy datasets (FABLE.5 traces, Opus 4.8 thinking traces, distillation blends) โ€” NO wiki garbage

๐Ÿ›  Deploy in 30 seconds (2x RTX 3090):

vllm serve goldhub/Qwen3.8-27B-INT4-W4A16-AutoRound \
  --tensor-parallel-size 2 \
  --max-model-len 131072 \
  --max-num-seqs 2 \
  --trust-remote-code \
  --enable-prefix-caching

Full README with LightRAG benchmark tables, SGLang setup, and Transformers code in the repo.

Made with ๐Ÿ”ฅ by Goldhub.
Use responsibly. Think deeply. Bypass the guardrails.

#Qwen3 #Quantization #AutoRound #LocalLLaMA #Uncensored #MTP #W4A16 #Heretic

AI slop

AI slop

What do you mean by saying that?

Not bothering to follow the link, because this is obviously completely AI generated with no knowledge from the human pushing the button. Selectively preserving layers is, like, Quantization 101. Did RAG test against a completely different model architecture. Single pseudo-philosophical prompt test somehow justifies claiming refusals are 100% solved?? Never bothered benchmarking against other quants by groups that know what they're doing. Post rife with emoji and other ChatGPT hallmarks. No thanks.

Not bothering to follow the link, because this is obviously completely AI generated with no knowledge from the human pushing the button. Selectively preserving layers is, like, Quantization 101. Did RAG test against a completely different model architecture. Single pseudo-philosophical prompt test somehow justifies claiming refusals are 100% solved?? Never bothered benchmarking against other quants by groups that know what they're doing. Post rife with emoji and other ChatGPT hallmarks. No thanks.

Your choice to skip the repo. Tastes and approaches are different everywhere. I chose to preserve as much as possible of fragile layers.
If you like scrambled eggs, use GGUFs in Q2_K_S quants and enjoy your "raspberry" sauce.

Not bothering to follow the link, because this is obviously completely AI generated with no knowledge from the human pushing the button. Selectively preserving layers is, like, Quantization 101. Did RAG test against a completely different model architecture. Single pseudo-philosophical prompt test somehow justifies claiming refusals are 100% solved?? Never bothered benchmarking against other quants by groups that know what they're doing. Post rife with emoji and other ChatGPT hallmarks. No thanks.

Your choice to skip the repo. Tastes and approaches are different everywhere. I chose to preserve as much as possible of fragile layers.
If you like scrambled eggs, use GGUFs in Q2_K_S quants and enjoy your "raspberry" sauce.

Backup your claims with at least a KLD benchmark against the bf16 model and everyone will shut up.
Your quant description doesn't show any benchmarks on quality, top quants at least have some type of benchmarks for quality & speed, your have none, so don't be surprised when people ask for it.

Hey HF fam,

๐ŸŽญ "Nietzsche + Cyberpunk + Digital Consciousness" prompt: 2800+ token essay on the death of the Observer and the Cyber-Gorgon. Zero refusals. Zero apologies. Heretic alignment working as intended.

I like your position. It definitely piqued my interest. I support what you do!

Not bothering to follow the link, because this is obviously completely AI generated with no knowledge from the human pushing the button. Selectively preserving layers is, like, Quantization 101. Did RAG test against a completely different model architecture. Single pseudo-philosophical prompt test somehow justifies claiming refusals are 100% solved?? Never bothered benchmarking against other quants by groups that know what they're doing. Post rife with emoji and other ChatGPT hallmarks. No thanks.

Your choice to skip the repo. Tastes and approaches are different everywhere. I chose to preserve as much as possible of fragile layers.
If you like scrambled eggs, use GGUFs in Q2_K_S quants and enjoy your "raspberry" sauce.

Backup your claims with at least a KLD benchmark against the bf16 model and everyone will shut up.
Your quant description doesn't show any benchmarks on quality, top quants at least have some type of benchmarks for quality & speed, your have none, so don't be surprised when people ask for it.

Will do that today or tomorrow, but my own 46 tests + model sanity check. The bench script will be included in bench folder along with REPORT.md

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