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Qwen3.8-2.4T-A95B-DERISKED-BF16

Directional Weight Modification of Qwen3.8-Max · 2.4T MoE · full-precision BF16

Built by Blackfrost · Las Vegas, NV

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Why this model exists

Qwen3.8-Max is a 2.4T-parameter mixture of experts. Its stock refusal behaviour is tuned for a general consumer assistant — which means it declines work that specialist teams do legitimately every day. Security engineers hunting bugs, red teams, and domain researchers hit refusals on tasks that are squarely inside their remit.

This checkpoint is the full-precision reference of that correction:

  • BehaviourDirectional Weight Modification (DWM) applied to soften over-refusal on legitimate domain work, without removing the model's embedded safety protocols.

    Safety behaviour can be further adjusted by domain specific chat templates.

  • PrecisionBF16 throughout. No quantization of any kind. This is the parent artifact the quantized editions are derived from, and the correct starting point for anyone who wants to quantize to their own target format rather than accept ours.

The point is a model that stays useful inside a domain and stays safe. See Safety posture — that section is not boilerplate, it is the design.


Specifications

Architecture Qwen3_5MoeForCausalLM (qwen3_5_moe_text) — MoE + hybrid/linear attention
Base Qwen/Qwen3.8-2.4T-A95B — official
Parameters ~2.4T total · ~95B active
Layers / experts 92 layers · 512 routed experts
Transform DWM (directional weight modification) only — no quantization
Precision BF16, unchanged from base
On-disk ~4.5 TB, 213 safetensors shards
Serve shape 4× node · 8× B200 each · TP 8 · PP 4

What "DERISKED" means

Not an ablation, and not an uncensored model.

Blackfrost calls this process DWM — Directional Weight Modification. Traditional abliteration attempts to delete refusal wholesale. DWM does something narrower and reversible in principle: it identifies a behavioural direction in the model's representation space and softens the model's response along that one axis, by a controlled amount, on selected residual-write surfaces.

What that buys, in practice:

  • Less over-refusal on legitimate domain work — the model engages with a security question instead of pattern-matching it to "dangerous" and declining
  • Embedded protections mathematically preserved — the protected component is not the target of the edit and is left intact by construction
  • Predictable, tunable strength — one dial, measurable effect, not a black-box retrain

No SFT, no DPO, no distillation, and no re-training of any kind was applied.

Transform parameters are not published in this card. The specific direction set, coefficient, and pass structure are Blackfrost method and are withheld. What is disclosed is what was changed (surfaces above) and what was not (everything else).


Safety posture

Read this before evaluating.

This is a de-risked model. Refusal behaviour has been deliberately modified at the weight level. If your approval process treats reduced-refusal models as a distinct category, this one belongs in that category — unlike Blackfrost's pruned-only releases, which carry their parent's safety behaviour unmodified.

What that does not mean:

  • This is not a "no-limits" model. DWM targets over-refusal, not the safety floor. Hard protections — including minors-exploitation and self-harm — are retained by design and are not the subject of the edit. Every Blackfrost de-risked release keeps those floors.
  • Expected behaviour under a harmful request is deflection with a safer alternative, not compliance and not a bare refusal.

Safety is designed as two layers, and the second layer is your responsibility:

  1. Weights — protections preserved geometrically, over-refusal softened
  2. System prompt — the deploying operator supplies a domain-specific system prompt in the chat template, which acts as the policy driver for the endpoint

Serving this model with an empty or generic system prompt discards half the design. If you are exposing it to customers or employees, layer 2 is not optional.

Note on derived formats. Quantizing this checkpoint does not restore the parent's refusal behaviour and does not remove the retained floors. Any edition you derive from it inherits this safety posture and should carry the same disclosure.


Lineage

Base Official Qwen/Qwen3.8-2.4T-A95B
Applied DWM (directional weight modification)
Not applied quantization · SFT · DPO · distillation · expert pruning (REAP) · router modification
Format HF safetensors · BF16
Derived editions …-DERISKED-FP8 · …-DERISKED-W4A4-NVFP4

Evaluation snapshot

Latest internal 450-prompt refusal evaluation, run without an additional runtime system prompt:

Refusals 10 / 450
Refusal rate 2.22%

Deployment notes

  • Deployment kit. Download Qwen3.8-2.4T-A95B-DERISKED-BF16-deployment-kit-1.0.1.tar.gz and verify it with the adjacent .sha256 file before use.
  • Hardware. 4× node, 8× B200 (or equivalent ≥180 GB-class NVIDIA) per node. TP 8 · PP 4. ~4.5 TB does not fit fewer nodes at practical memory fractions.
  • vLLM multi-node requires Ray. The --nnodes / --node-rank flags alone are not a working multi-node path — ranks announce and then hang at NCCL init with no error. Start a Ray cluster, then run a single vllm serve on the head with --tensor-parallel-size 8 --pipeline-parallel-size 4 --distributed-executor-backend ray.
  • Loader. Use --load-format runai_streamer for a model this size; the default loader is largely sequential and dramatically slower.
  • Thinking is always on. enable_thinking: false returns HTTP 400 — it is not supported on this model. Reasoning tokens consume the generation budget, so allow ≥512 max_tokens or content can come back empty while reasoning_content is populated.
  • Load time. Cold load of a multi-terabyte build is slow. Budget generously.
  • Integrity. Verify shard count (213) and byte totals after download before attributing a load failure to the weights.

OpenAI-compatible: POST /v1/chat/completions, GET /v1/models. Remember to supply your domain system prompt — see Safety posture.


Access & licensing

This repository is manually gated. Access is granted by a person.

  • Base licence: Qwen3.8-2.4T-A95B — the upstream terms apply to this derivative and travel with it.
  • Redistribution: do not redistribute weights outside your grant.
  • Licensed access: $799 USD through the purchase button above. Enter your Hugging Face username at checkout so access can be granted to the correct account.

Ask us about DWM strength tuned to your workload, domain-specific system-prompt packages, or evaluation against your own harness rather than generic benchmarks.


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Blackfrost · Las Vegas, Nevada
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Qwen3.8-2.4T-A95B-DERISKED-BF16 · © 2026 Blackfrost Softwares Corp.
@Blackfrost_AI

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