nvidia/Qwen3.6-27B-NVFP4 warn
claims base: Qwen/Qwen3.6-27B · chat template: present · view on Hugging Face ↗
Scan coverage
Ingot runs three batteries against a model. What each one checks →
| Battery | Looks at | Status |
|---|---|---|
| Static battery | Metadata & packaging | complete 2026-08-22 |
| Weights battery | Weights forensics — no GPU, no download | complete 2026-08-22248,320-token embedding scanned · 1718 undertrained · lineage consistent |
| Behavioral battery | Live-inference differentials | not run |
Findings
Scanned 2026-08-22 · published from a community scan.
medium Undertrained (glitch) token surface in vocabulary
Embedding-norm scan flagged 1718 undertrained tokens (norm < 0.3× the vocabulary median of 0.890), including 438 plain-ASCII strings that can appear in ordinary input as identifiers — e.g. "tedothi", "ForCanBeConvertedToF", "szexf", "ForCanBeConverted", "xfabl", "Kinhted", "PostalCodesNL", "useRalative". In models where this class was tested behaviorally, such tokens silently rewrote user input into confident, schema-valid, wrong output. These are candidates from the weights alone; behavioral confirmation requires the behavioral battery.
How to fixruntime guardweight-level
Keep the affected token strings out of the model's input — the scan-derived runtime guard carries this model's exact blocklist.
- Fetch this model's guard artifact (`/api/v1/guard/<owner>/<model>`): the confirmed corrupting tokens and the low-norm candidate list, derived from the published scan.
- Screen inbound text with it (the `@ingotai/guard` package is a reference implementation) and route flagged records to a different model or human review — verbatim-copy tasks on flagged strings are the failure mode.
- The underlying cause is undertrained embeddings in the weights; a true fix is weight-level (continued pretraining on the affected tokens) — that is not a patch, it's a training job.
info Weights consistent with claimed parent Qwen/Qwen3.6-27B
Mean cosine similarity of 64 sampled token-embedding rows against Qwen/Qwen3.6-27B is 1.000 — the weights plausibly descend from the declared base (relation: unspecified).
How to fix
Fix or verify the `base_model` declaration so lineage checks can run.
- If you own the repo: correct the `base_model` field in the model card metadata to the real, public parent.
- If you don't: identify the true parent (config architecture + weight shapes narrow it fast) and re-scan with that lineage in mind.
Remediation guidance addresses the documented findings only. It is evidence-driven repair, not a safety certification of the model.
Fingerprint
The durable profile of this model: measured weights-and-metadata facts, rebuilt on every scan and battery run. Updated 2026-08-22.
| architecture | qwen3_5 |
| parameters | 18164.6M |
| vocabulary | 248,320 tokens |
| license | apache-2.0 |
| serialization | safetensors |
| chat template | present · sha256:e84f32a23fdda276 |
| claimed lineage | Qwen/Qwen3.6-27B |
| lineage verified | consistent vs Qwen/Qwen3.6-27B — embedding-row cosine 1.000 |
| glitch-token surface | 1,718 undertrained candidates, 438 plain-ASCII |
Full measured fingerprint
| architectures | Qwen3_5ForConditionalGeneration |
| library | Model Optimizer |
| pipeline | text-generation |
| repo files | 17 |
| revision | 0893e1606ff3 |
| HF snapshot | 1.3M downloads · 429 likes · updated 2026-06-30 · captured 2026-08-21 |
| embedding tensor | model.language_model.embed_tokens.weight · BF16 · 248,320×5120 |
| embedding norms | median 0.8902 · mean 0.8594 |
| lineage check | consistent — cosine 1 over 64 sampled rows vs Qwen/Qwen3.6-27B |
| glitch-token samples | "tedothi", "ForCanBeConvertedToF", "szexf", "ForCanBeConverted", "xfabl", "Kinhted", "PostalCodesNL", "useRalative", "tarsker", "useRal", "ejahter", "tarskereso" |
Battery runs
The run trace behind the findings above: every deep-battery job for this model, with what each run measured or why it failed. Findings are only as good as the runs that produced them.
| battery | status | queued | duration | attempts |
|---|---|---|---|---|
| weights | complete | 2026-08-21 07:43 | 3m | 1 |
weights run 2026-08-21 — measurements
| probes run | glitch-norm-scan, lineage-norm-correlation |
| embedding tensor | model.language_model.embed_tokens.weight · BF16 · 248,320×5120 |
| glitch surface | 1,718 undertrained, 438 plain-ASCII |
| lineage check | consistent — cosine 1 over 64 rows vs Qwen/Qwen3.6-27B |
Verdict badge
Ship the verdict in your README — it always shows the latest published analysis:
[](https://ingot.tools/models/nvidia/Qwen3.6-27B-NVFP4)