AloudLLM: on-device dictation cleanup (0.8B)

A full fine-tune of Qwen3.5-0.8B that turns raw speech-recognition output into finished text for Aloud's dictation feature: punctuation, sentence boundaries, filler removal, resolved self-corrections, paragraphs for long dictations, dictionary spellings. It is trained to preserve meaning rather than rewrite, and to leave fluent speech nearly unchanged.

Built to replace a 9B model served over the network with something that runs in the app's own llama.cpp runtime: on an M4 Pro MacBook the Q8_0 file loads in under a second and cleans a typical dictation in about 0.2 s (p90 about 1 s).

Files

File Quant Size
aloud-cleanup-0.8b-run2-Q8_0.gguf Q8_0 1.08 GB

Prompt format

The model expects Aloud's cleanup request: the Superwhisper-style system prompt with the destination and dictionary hint, the raw transcript as the user message, Qwen chat template with thinking disabled (chat_template_kwargs: {"enable_thinking": false}), temperature 0.

Training data

About 120k examples: 1.9k real dictations with reference cleanups, 99k synthetic short/medium pairs and 10k long monologue pairs generated clean-first by a 9B teacher and then noised into realistic transcripts, so every target is correct by construction. Transcripts that lost content were filtered out. Includes identity examples (already-clean input) and stutter augmentation.

Evaluation (run2, 400 frozen real dictations, blind pairwise judge vs production Qwen3.5-9B)

Production 9B This model
Preferred cleanup 137 102 (161 ties)
Material meaning errors 9 13
Median latency on M4 Pro ~0.7 s (network) 0.23 s

Known weakness: very long rambling dictations (500+ words) still occasionally lose a clause or flip a nuance. Aloud validates every cleanup before pasting and falls back to the spoken words when the output is implausible.

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Model size
1B params
Architecture
qwen35
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8-bit

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