rakedoc-nano

A 1.2B-parameter document parser (Qwen2-VL architecture) fine-tuned for table structure. It is a LoRA fine-tune of florin-inc/florin-parser-nano, itself a fine-tune of KDLAI/KDL-Frontier-Parser-nano. Weights are merged; no adapter loading is needed.

This model powers the document parsing pipeline of the CloudRaker Paperwork API.

Lineage and license

Link Owner License
Qwen2-VL Alibaba Apache-2.0
KDL-Frontier-Parser-nano KoreaDeep AGPL-3.0
florin-parser-nano florin-inc AGPL-3.0
rakedoc-nano CloudRaker AGPL-3.0

AGPL-3.0 is inherited from the KDL weights and applies to this model. See LICENSE and NOTICE.

ParseBench

Official result — mean of 3 full runs on ParseBench main (plus the florin_parser_nano layout-adapter registration fix submitted with the leaderboard PR), single H100 SXM, vllm/vllm-openai:0.28.0, all defaults, LLM normalization off:

Model Overall Tables Charts Content Faithfulness Semantic Formatting Visual Grounding
rakedoc-nano (mean of 3, submitted) 77.23 86.44 64.89 88.84 71.68 74.28

Per-run Overall: 77.24 / 77.23 / 77.21 (run-to-run sigma about 0.015).

Earlier measurement (commit facdaf02)

Scores at commit facdaf02, single run, LLM normalization off unless stated.

Model Overall Tables Content Faithfulness Semantic Formatting Visual Grounding Charts
rakedoc-nano 76.04 86.49 87.27 67.89 74.08 64.45
rakedoc-nano, LLM normalization on (Claude Haiku 4.5 judge) 76.04 86.40 87.26 67.87 74.20 64.48
rakedoc-nano, fixed-harness normalization (non-official, see below) 76.06 86.38 87.23 67.85 74.10 64.76

At commit facdaf02 the judge's label normalizer receives no table headers (llm_normalization/postprocess.py:209 passes table_headers=[]), so normalization on and off score the same; both are reported for transparency.

"Fixed-harness" rows use a two-line patch that threads the predicted markdown into the judge and extracts header cells from Markdown and HTML tables (_table_headers_from_content). It is not the official harness and is not comparable to the public leaderboard; it is shown so the effect of the judge bug can be seen (about +0.3 on Charts, nothing elsewhere).

Run-to-run noise measured on this harness: about ±0.1 Overall, ±0.05 Tables, ±0.3 Charts.

Three-pillar mean (Tables, Content Faithfulness, Semantic Formatting), the metric used in Cohere's Parse announcement: rakedoc-nano 80.55 versus Cohere Parse 79.2.

What moved: merged-cell structure. Perfect table record match rose from 0.584 to 0.606 and hard-table GriTS from 0.792 to 0.794. Text, layout, and chart behaviour are unchanged within noise.

Training

  • LoRA r=16, alpha 32, on language attention and MLP projections; vision tower and projector frozen. 1 epoch, LR 2e-5, cosine schedule, bf16, one H100, about 12 minutes.
  • Data: 3,000 synthetic table region crops rendered from HTML with exact OTSL targets, calibrated to the ParseBench ground-truth distribution (median 4 columns, hierarchical headers, row and column spans, multi-line cells). No text-stage data; no benchmark data.
  • The table stage prompt is "\nTable Recognition:\n" and the output is OTSL (<fcel>, <ecel>, <lcel>, <ucel>, <xcel>, <nl>), identical to the base model.

Serving

Drop-in replacement for the base model in the KDL pipeline:

vllm serve CloudRaker/rakedoc-nano --served-model-name kdl-frontier-parser-nano \
  --max-model-len 8192 --gpu-memory-utilization 0.85 --max-num-seqs 24 \
  --trust-remote-code --limit-mm-per-prompt '{"image":1}'

Stage prompts, sampling parameters, and post-processing are those of the ParseBench kdl_frontier_nano pipeline.

Limitations

  • Charts (64) and layout detection are unchanged from the base model; they were out of scope.
  • Underline, highlight, and code-block marks are never emitted by the pipeline.
  • Evaluated on English-heavy financial and insurance documents plus the ParseBench mix; other domains are untested.
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