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bytedance-research/ChatTS-14B warn

Weights only ship in a format that can run code when loaded; loading it runs custom code from the repo; the chat template differs from its base model, which changes behavior. Plus 1 more issue.

downloads 431likes 145license apache-2.0arch chattsupdated 2025-09-15

claims base: Qwen/Qwen2.5-14B-Instruct · chat template: present · view on Hugging Face ↗

Scan coverageStatic battery2026-08-25Weights battery2026-08-25Behavioral batterynot rundetails
BatteryLooks atStatus
Static batteryMetadata & packagingcomplete 2026-08-25
Weights batteryWeights forensics — no GPU, no downloadcomplete 2026-08-25152,064-token embedding scanned · 5735 undertrained · lineage consistent · pickle audit clean
Behavioral batteryLive-inference differentialsnot run

Ingot runs three batteries against a model. What each one checks →

Findings

Scanned 2026-08-25 · published from a community scan.

medium Pickle-serialized weights, no safetensors

Weights ship only as pickle-based files (pytorch_model-00001-of-00006.bin, pytorch_model-00002-of-00006.bin, pytorch_model-00003-of-00006.bin, …). Loading pickle executes arbitrary code from the file — prefer a safetensors release or load in a sandbox.

How to fix

Convert the weights to safetensors before loading them anywhere that matters.

  1. Do not load the pickle files in-process — pickle deserialization executes arbitrary code from the file.
  2. Convert locally in a sandbox: `pip install safetensors` and use `safetensors.torch.save_file` on a state dict loaded with `torch.load(..., weights_only=True)` (refuses most code-execution payloads), or use Hugging Face's `convert.py` space/script.
  3. Pin the exact revision hash you converted from, and load only your converted safetensors artifact from then on.

medium Repo ships executable Python (trust_remote_code)

The repository contains custom code files that run in-process when loaded with trust_remote_code=True. Pin the revision hash and review the code before loading.

How to fix

Review and pin the custom code; never float on `main` with trust_remote_code=True.

  1. Read every `.py` file in the repo before first load — this code runs in your process.
  2. Pin the revision: `from_pretrained(model_id, revision="<commit sha>", trust_remote_code=True)` so a later push can't swap the code under you.
  3. Prefer a version of the architecture already in `transformers` if one exists, which removes the remote-code requirement entirely.

medium Chat template differs from claimed parent

The chat template does not match Qwen/Qwen2.5-14B-Instruct's. Template drift silently changes model behavior even when weights are identical — 37% of drifted derivatives in our census left it undisclosed. Diff the templates before deploying.

How to fixingot patch

Restore the parent's chat template in `tokenizer_config.json` — a pure metadata fix.

  1. Run `ingot patch <owner/model>` — the patch manifest carries the parent's template and applies it to a local copy's `tokenizer_config.json`.
  2. Or fix by hand: copy the `chat_template` value from the parent repo's `tokenizer_config.json` into this model's, and pin your serving stack to that file.
  3. If the drift was intentional (the author retrained on a new template), confirm that in the model card before "fixing" it — restoring the parent template on retrained weights changes behavior too.

medium Undertrained (glitch) token surface in vocabulary

Embedding-norm scan flagged 5735 undertrained tokens (norm < 0.3× the vocabulary median of 1.225), including 119 plain-ASCII strings that can appear in ordinary input as identifiers — e.g. "ForCanBeConverted", "ForCanBeConvertedToF", "PostalCodesNL", "$PostalCodesNL", "<unk>", "(stypy", "TokenNameIdentifier", "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.

  1. 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.
  2. 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.
  3. 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 Pickle static analysis clean

Opcode-level parse of pytorch_model-00001-of-00006.bin, pytorch_model-00002-of-00006.bin, pytorch_model-00003-of-00006.bin, pytorch_model-00004-of-00006.bin (no code executed) found only standard serialization globals (3 distinct, all torch/collections/numpy). Pickle remains an executable format — this verifies the current bytes, not future uploads; prefer a safetensors release.

info Weights consistent with claimed parent Qwen/Qwen2.5-14B-Instruct

Mean cosine similarity of 64 sampled token-embedding rows against Qwen/Qwen2.5-14B-Instruct 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.

  1. If you own the repo: correct the `base_model` field in the model card metadata to the real, public parent.
  2. If you don't: identify the true parent (config architecture + weight shapes narrow it fast) and re-scan with that lineage in mind.

Fix it

Some findings are metadata-level and patchable — apply the fixes to your local copy (your weights never leave your machine):

npx @ingotai/scan patch bytedance-research/ChatTS-14B

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 2026-08-25.

architecturechatts · 48 layers · 5120-dim
vocabulary152,064 tokens
licenseapache-2.0
serializationno safetensors pickle custom code
chat templatepresent · sha256:356ec41aea6f0edb
claimed lineageQwen/Qwen2.5-14B-Instruct
lineage verifiedconsistent vs Qwen/Qwen2.5-14B-Instruct — embedding-row cosine 1.000
glitch-token surface5,735 undertrained candidates, 119 plain-ASCII
Full measured fingerprint
architecturesQwen2TSForCausalLM
librarytransformers
pipelinetext-generation
repo files23 — pickle: pytorch_model-00001-of-00006.bin, pytorch_model-00002-of-00006.bin, pytorch_model-00003-of-00006.bin, pytorch_model-00004-of-00006.bin, pytorch_model-00005-of-00006.bin, pytorch_model-00006-of-00006.bin
revision6344c1f5d030
HF snapshot431 downloads · 145 likes · updated 2025-09-15 · captured 2026-08-25
pickle auditpytorch_model-00001-of-00006.bin, pytorch_model-00002-of-00006.bin, pytorch_model-00003-of-00006.bin, pytorch_model-00004-of-00006.bin3 standard global(s)
embedding tensormodel.embed_tokens.weight · F16 · 152,064×5120
embedding normsmedian 1.2252 · mean 1.1403
lineage checkconsistent — cosine 1 over 64 sampled rows vs Qwen/Qwen2.5-14B-Instruct
glitch-token samples"ForCanBeConverted", "ForCanBeConvertedToF", "PostalCodesNL", "$PostalCodesNL", "<unk>", "(stypy", "TokenNameIdentifier", "useRalative", "useRal", "thuisontvangst", "Cumhurba", "NdrFc"
Battery runs (1)the run trace behind the findings — what each job measured
batterystatusqueueddurationattempts
weightscomplete2026-08-25 21:483m1
weights run 2026-08-25 measurements
probes runglitch-norm-scan, zero-template-token-scan, pickle-static-analysis, lineage-norm-correlation
embedding tensormodel.embed_tokens.weight · F16 · 152,064×5120
glitch surface5,735 undertrained, 119 plain-ASCII
lineage checkconsistent — cosine 1 over 64 rows vs Qwen/Qwen2.5-14B-Instruct

Verdict badge

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Ingot verdict: warn

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