Sophro-4B-memory-v1

Sophro is the on-device model of Zynkbot, a personal AI assistant that keeps its memory of you on your own devices. It is Qwen3-4B-Instruct-2507 fine-tuned for one habit: when it reads what you said, it stores what was said and nothing more. The name is from sophrosyne, the Greek word for soundness of mind and self-restraint.

Zynkbot downloads this file at first run and uses it for chat, memory extraction and memory linking on phones and computers, with no key and nothing sent anywhere.

File

File Format Size SHA-256
Sophro-4B-memory-v1-Q4_0.gguf GGUF, Q4_0 2.37 GB da0a9b08e9be4f2a9d806b85f70ce90c824e8e0fb8fe53c79958a84e0c5f5b1b

Q4_0 was chosen so that the same file serves the CPU, GPU and NPU paths on Snapdragon phones. Runs with llama.cpp and anything built on it. Context window as the base model; Zynkbot uses 4096 tokens on phones and 8192 on computers.

How it was trained

A LoRA adapter was trained on a single consumer GPU (about ten minutes a run) from two sources: 933 real user messages labelled by a stronger model (Claude) with the exact memory-extraction prompt Zynkbot sends, and 349 memory-relationship cases written by the same model, all filtered by the project's benchmark pass rules. The adapter was merged into the base model and the result quantised to Q4_0. The loss was taken on the answer only.

The training messages are one person's private conversations and are not published.

Results

Zynkbot's memory bench, 128 held-out cases that were never in the training data, phone prompt, 2026-10-28:

Model Facts found (of 69) Invented Junk (of 26) Relationships (of 44) Extraction time Relationship time
Base Qwen3-4B Q4_0 66 7 0 28 0.30 s 0.99 s
Sophro-4B-memory-v1 68 1 0 38 0.31 s 0.21 s

The six relationship misses are five "updates" called "contradicts" and one "none" called "related". Full method and the other benches: BENCHMARKS.md.

Standard benchmarks

Did the tuning cost the model anything else? Both models the exact Q4_0 files above, llama.cpp on one GPU, temperature 0, lm-evaluation-harness 0.4.13, 2026-11-02/03:

Benchmark Base Qwen3-4B Q4_0 Sophro-4B-memory-v1
IFEval, prompt-level strict 81.3% 81.2%
IFEval, prompt-level loose 84.8% 85.4%
GSM8K, 8-shot CoT, strict match 80.0% 83.8%
MMLU, 25 per subject, scored by the first answer letter 71.6% 71.4%

Instruction following and knowledge are unchanged, arithmetic slightly better. Two honest notes: the harness's stock MMLU scorer wants the bare letter, and Sophro tends to write "D. 0,4" rather than "D", which the stock scorer counts as wrong (that line reads 54.7% against 24.0%; the first-letter score above is the one that measures knowledge). And on IFEval's 31 prompts that ask for a reply in another language, Sophro passes 23 against the base's 30: it tends to fall into repetition in Hindi, Marathi, Nepali and Bengali. On the 510 English prompts it is at 81.6% against 80.4%. Zynkbot uses it in English.

Prompt format

The Qwen3 chat template, as declared in the GGUF file. No thinking mode.

Licence

Apache-2.0, the same as the base model. Qwen3 is ยฉ Alibaba Cloud; the fine-tune is by Matt Skillman, Contain AI.

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