Qwen3.8 Perian GGUF

Qwen3.8 Perian is a deliberately compressed and post-trained Qwen3.8-Flash-Next lineage. It combines depth pruning, routed-expert width reduction, and a document-disjoint, activation-informed reduction of the PLE n-gram table, then adds a rank-32 QLoRA trained on frontier-model reasoning trajectories.

What was reduced

  • Depth: 48 transformer layers were reduced to 32 (16 layers removed; 33.3% fewer layers).
  • Routed-expert width: 384 experts per layer were merged to 288 (96 fewer expert slots per layer; 25% reduction), while retaining 10 selected experts per token. The merge used layer-local router, similarity, and activation saliency evidence from 1,024 calibration sequences of 512 tokens, weighted toward tool use, executable code, retrieval, and multi-step reasoning.
  • PLE n-gram capacity: 320,001,446 rows were reduced to 160,000,768 rows (50%). This removed about 25.60B parameters. The frozen selection combined activation-aware bigram heads 0-7 with frequency-ranked trigram heads 8-15 and was validated on a document-disjoint 5M-token holdout.

The resulting compact BF16 base contains 74,615,655,680 parameters and 150,511,416,232 tensor bytes before GGUF quantization.

QLoRA post-training

The compact model was post-trained with rank-32 QLoRA on 12,558 normalized traces covering coding and debugging, mathematics and STEM reasoning, agentic/tool-use trajectories, retrieval, and general multi-step reasoning. The mixture contains traces produced by several frontier model families, including Fable 5, GLM 5.2, Kimi K3, Claude Opus 4.7, Qwen3.8-Max, and GPT-5.6-Sol. Assistant reasoning, answers, tool calls, and end-of-message tokens were supervised; prompts, tool definitions/results, and repeated context were masked. The merged checkpoint used here is the rank-32 milestone at 9,336,692 supervised assistant tokens.

The private normalized training corpus has 25,811,891 canonical rendered tokens and 10,299,662 canonical supervised tokens. It remains private because its upstream records do not share one uniform license or blanket downstream-use clearance. The adapter source is jakeatx/ream-288-rank32-3m-adapter at revision 41947bd12f74482906995f47b5c8a7c5703cfca1, path milestones/checkpoint-wall-9336692/adapter.

Files

File Size SHA-256 Recipe
Qwen3.8-Perian-UD-Q4-K-XS.gguf 44,842,893,088 bytes (44.84 GB) 70896b81fe0c4c24757a6df4344ec28c133a8c1893573227c1fe5593fcc89058 Unsloth UD-Q3_K_XL tensor recipe with every IQ2/IQ3 XS-family assignment promoted to IQ4_XS.
Qwen3.8-Perian-Q4-K-M.gguf 51,589,880,608 bytes (51.59 GB) 9e40972ffa1248543616dc915555dca8f412100135507b43d8dc95d97bf48def Standard llama.cpp control.
Qwen3.8-Perian-UD-Q5-K-XL.gguf 69,482,800,928 bytes (69.48 GB) 9d22ba116ad68b3d2f018247c7299cc7b8e1a386b79a5de7e093d4dfc1f6c6d6 Current Unsloth Qwen3.8 tensor assignments for retained blocks 0-31.
Qwen3.8-Perian-Q8-0.gguf 80,656,975,648 bytes (80.66 GB) e71c7e0e840bb4fe6e4d5684a412ee9e9c5d7cb029640ebe4555219e50e34d52 Standard high-fidelity control.

The GGUF converter and quantizer use a pinned, patched qwen4exp llama.cpp build that preserves the compact PLE remap tensor as integer metadata. A compatible runtime must understand the qwen4exp architecture and compact PLE remap.

Status and limitations

The GGUFs do not yet include a validated MTP draft head. Treat MTP attachment as a separate runtime-compatibility milestone rather than assuming the draft head from the unpruned 48-layer model is compatible with this 32-layer trunk. The pruning, holdout, merge, and training gates passed, but these artifacts should still be evaluated on the target runtime and benchmark suite before a production deployment decision.

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