---
language:
- en
license: mit
library_name: transformers
tags:
- text-classification
- diagnostic
- long-context
- custom-code
datasets:
- ag_news
pipeline_tag: text-classification
---

# stratabert-tiny-smoke

## Model Summary

This is a StrataBERT diagnostic checkpoint from `run_001`. Claim status: `diagnostic_only`. It is not a release-quality checkpoint and must not be used for public quality or efficiency claims.

## Architecture

```text
tokens -> embeddings -> [global attention / bidirectional SSM / local attention]* -> mask-aware pooling -> task head
```

Architecture class: `StrataBertForSequenceClassification`. Layer types: `['global_attention', 'ssm', 'local_attention']`. Hidden size: `48`. Max positions: `128`.

## Parameter Count

Total parameters: `2498404`.

## Training Data

Data artifacts:
- `train_index`: `data/eval_frozen/run_001/ag_news_train_index_sample64.json`
- `eval_index`: `data/eval_frozen/run_001/ag_news_eval_index_sample200.json`

Raw text is not embedded in this card or the frozen eval indices.

## Objective Mix

- `task`: 1.0

## Teacher Models

No teacher model is used for this checkpoint.

## Licenses

Project code license: MIT. Dataset audit summary:
- `ag_news_v001`: `restricted_noncommercial_unclear`; No standard permissive license is declared.
- `arxiv_classification_v001`: `needs_review_full_text_rights`; Selected HF repo does not declare a data license.
- `bc5cdr_v001`: `needs_review_bc5cdr_tner_mirror`; No source-license research entry is present; manifest note: Canonical bigbio/bc5cdr script is disabled by current datasets versions; executable manifest uses TNER BC5CDR converted parquet.
- `conll2003_v001`: `restricted_avoid_publication_claims`; Highest-risk MVP dataset because the source text is Reuters copyrighted newswire.
- `eurlex57k_v001`: `needs_review_lexglue_eurlex`; No source-license research entry is present; manifest note: HF datasets metadata inspected with datasets.load_dataset_builder('coastalcph/lex_glue', 'eurlex') on 2026-06-10.
- `hyperpartisan_news_v001`: `needs_review_hyperpartisan_mirror`; No source-license research entry is present; manifest note: HF parquet metadata inspected on 2026-06-10 via jonathanli/hyperpartisan-longformer-split.
- `imdb_v001`: `restricted_noncommercial_unclear`; HF license tag is other rather than a permissive license.
- `openpii_1m_v001`: `approved_cc_by_4_0_attribution_required`; No source-license research entry is present; manifest note: HF datasets metadata inspected with datasets.load_dataset_builder('ai4privacy/pii-masking-openpii-1m', 'default') on 2026-06-10.
- `patent_classification_v001`: `needs_review_mirror_license`; The selected ccdv sample repo does not declare its own license.
- `pubmed_200k_rct_v001`: `needs_review_pubmed_rct_mirror`; No source-license research entry is present; manifest note: HF parquet metadata inspected on 2026-06-10.
- `scicite_v001`: `needs_review_allenai_scicite`; No source-license research entry is present; manifest note: Legacy dataset script is disabled by current datasets versions; executable manifest uses HF converted parquet files.
- `twenty_newsgroups_v001`: `needs_review_dataset_card_blank`; No source-license research entry is present; manifest note: HF parquet metadata inspected on 2026-06-10 via refs/convert/parquet.

## Intended Uses

- Local smoke testing of StrataBERT checkpoint loading, evaluation scripts, and metadata plumbing.
- Reproducibility checks for run_001 diagnostic artifacts.

## Out-of-Scope Uses

- Public benchmark claims.
- Production classification or token-classification deployment.
- Commercial reuse of dataset-derived behavior without legal review of the relevant datasets.

## Evaluation

| metric | value |
| --- | --- |
| `accuracy` | 0.26 |
| `macro_f1` | 0.10317460317460318 |
| `weighted_f1` | 0.10730158730158731 |
| `loss` | 1.3858718490600586 |

Evaluation artifact: `checkpoints/run_001/tiny_ag_news_smoke`.

## Length-Bucketed Results

| bucket | support | accuracy |
| --- | ---: | ---: |
| `0_512` | 200 | 0.26 |

## Latency and Memory

| item | value |
| --- | --- |
| device | cpu |
| batch size | 2 |
| sequence length | 128 |
| p50 latency ms | 10.763351499917917 |
| p95 latency ms | 12.447670099209063 |
| latency 95% CI ms | 0.6102587742635365 |
| examples/sec | 180.17026675821398 |
| tokens/sec | 23061.79414505139 |
| OOM status | not_oom |
| max batch under memory cap | 2 |

Memory measurements are not release-grade in this diagnostic card unless explicitly listed above.

## Hardware and Software

- Training/eval torch: `2.12.0+cu130`
- CUDA available during checkpoint creation: `False`
- Latency environment: `{'cuda': '13.0', 'cuda_available': False, 'platform': 'Linux-6.14.0-37-generic-x86_64-with-glibc2.41', 'python': '3.12.13', 'torch': '2.12.0+cu130'}`
- Vast AI: `None`

## Known Limitations

- Random or tiny diagnostic training only; no release-quality pretraining.
- Mandatory ModernBERT, Ettin, DeBERTa-v3, Longformer, BigBird, and embedding baselines are still pending.
- Long-context 2k/4k/8k claims are unsupported by this card.
- Dataset license caveats remain unresolved for public claims.

## Ethical and Privacy Considerations

This checkpoint is diagnostic and should not be deployed. Dataset provenance and privacy review are incomplete for release use, and token-classification public claims require a publication-safe dataset replacement or legal approval.

## Reproducibility

- Training command: `scripts/finetune_classification.py --train-index data/eval_frozen/run_001/ag_news_train_index_sample64.json --train-split train --eval-index data/eval_frozen/run_001/ag_news_eval_index_sample200.json --eval-split test --max-train-examples 32 --max-eval-examples 64 --batch-size 8 --epochs 1 --max-length 96 --lr 5e-4 --seed 1337 --output runs/run_001/eval_reports/stratabert_tiny_ag_news_finetune_smoke.json --checkpoint-dir checkpoints/run_001/tiny_ag_news_smoke`
- Tokenizer: `{'source': 'answerdotai/ModernBERT-base', 'vocab_size': 50368}`
- Seed: `1337`
- Checkpoint path: `checkpoints/run_001/tiny_ag_news_smoke/model.safetensors`
- Evaluation reports: `data/eval_frozen/run_001/ag_news_eval_index_sample200.json`

## Citation

Use `CITATION.cff` from this repository. Title: StrataBERT: A Padding-Safe SSM-Attention Encoder for Efficient Long-Document Classification.

## Exact Git Commit

Commit: `no_commit_yet`. Dirty worktree at checkpoint creation: `True`.