ara-diac-plane-large-1.0

Part of the Secryst phonological-layer family — a dedicated model for diacritization (AR), distributed as a Secryst IMF artifact and loadable through any Secryst crystal:

from secryst import Model
Model.load("ara-diac-plane-large-1.0")

• Artifact: ara-diac-plane-large-1.0.zip (0.81 GiB)

Measured quality

Full evaluation sets, zero skipped examples, the benchmark's own evaluator. Provenance for every number is the results record of the training project.

metric	value	provenance
der_total_greedy	2.7397	interscript/interscript-ml docs/RESULTS.md#run-019-epoch-2--27397-second-epoch-closes-a-third-of-the-gap-sota-gate-still-open-2026-10-05
der_morph_greedy	1.6717	interscript/interscript-ml docs/RESULTS.md#run-019-epoch-2--27397-second-epoch-closes-a-third-of-the-gap-sota-gate-still-open-2026-10-05
wer_total_greedy	8.6083	interscript/interscript-ml docs/RESULTS.md#run-019-epoch-2--27397-second-epoch-closes-a-third-of-the-gap-sota-gate-still-open-2026-10-05

Benchmark

Full-set SadeedDiac-25 — 1,200 paragraphs, zero skipped, greedy decode (protocol-matched, Misraj's evaluator):

model	Total DER	notes
ara-diac-2.0 (teacher, 580M seq2seq)	2.29%	best dedicated
ara-diac-plane-large-1.0 (this model)	2.74%	866 MB int8
Gemini-Flash-2.0 (frontier LLM)	3.19%
ara-diac-plane-1.0 (plane small)	3.59%	219 MB int8
ara-diac-small-2.1 (seq2seq student)	4.57%	491 MB int8

The second-best dedicated system overall, ahead of Gemini-Flash, and the best that ships as one self-contained int8 ONNX graph. Morph DER 1.67% (iʿrāb quality); total WER 8.61%.

Architecture

Plane-factorized diacritization at the ByT5-LARGE encoder scale: a byte-level encoder-only transformer (no decoder) with a diacritic-plane embedding and one classification head over 54 haraqat classes per character position. Decoding is K=2 mask-predict passes — parallel forwards feeding the predicted plane back; no KV cache, no autoregressive loop. Skeleton round-trip is byte-exact.

The artifact is a single self-contained int8 ONNX graph in the plane zip contract (metadata.yaml with member sha256s + plane.onnx + classes.json), loadable by secryst-py PlaneModel.from_zip. The canonical distribution is the Secryst IMF artifact (sha256-verified); this repository mirrors those exact bytes.

Provenance: rababa run-019, 2 epochs over 551k unique units. The epoch-2 number is the corrected measurement — the first epoch-2 eval silently re-scored epoch-1 predictions and was re-run in full (see the interscript-ml RESULTS ledger).

License

BSD-3-CLAUSE

Provenance

Trained in the Secryst training monorepo and published through the interscript-ml distribution contract (models.yaml index, sha256-verified release assets, parity-gated artifacts). The canonical download channel is GitHub Releases; this repository is the Hugging Face mirror of the same bytes, pinned to the index revision.