How to use from
llama.cpp
Install (macOS, Linux)
curl -LsSf https://llama.app/install.sh | sh
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf bytesbrains/naderu-mini-4b:Q6_K
# Run inference directly in the terminal:
llama cli -hf bytesbrains/naderu-mini-4b:Q6_K
Install from WinGet (Windows)
winget install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf bytesbrains/naderu-mini-4b:Q6_K
# Run inference directly in the terminal:
llama cli -hf bytesbrains/naderu-mini-4b:Q6_K
Use pre-built binary
# Download pre-built binary from:
# https://github.com/ggerganov/llama.cpp/releases
# Start a local OpenAI-compatible server with a web UI:
./llama-server -hf bytesbrains/naderu-mini-4b:Q6_K
# Run inference directly in the terminal:
./llama-cli -hf bytesbrains/naderu-mini-4b:Q6_K
Build from source code
git clone https://github.com/ggerganov/llama.cpp.git
cd llama.cpp
cmake -B build
cmake --build build -j --target llama-server llama-cli
# Start a local OpenAI-compatible server with a web UI:
./build/bin/llama-server -hf bytesbrains/naderu-mini-4b:Q6_K
# Run inference directly in the terminal:
./build/bin/llama-cli -hf bytesbrains/naderu-mini-4b:Q6_K
Use Docker
docker model run hf.co/bytesbrains/naderu-mini-4b:Q6_K
Quick Links

naderu-mini-4b

A compact on-device offline-chat model by Naderu โ€” a BytesBrains Pte. Ltd. venture.

naderu-mini is the on-device fallback that powers the Naderu assistant inside the AiToolK.it app when the device is offline โ€” no cloud, no data leaving the phone. It runs locally via llama.cpp. The assistant presents as Naderu (the offline version); the model's name is naderu-mini, and it states its upstream base plainly โ€” in this card and in its own answers.

Provenance

  • Base: Qwen/Qwen3-4B (Apache-2.0), pinned revision 1cfa9a72.
  • Method: identity/behaviour SFT (LoRA r=8, 16 layers, lr 3e-5, 600 iters via MLX, non-thinking mode), fused, then quantized to GGUF Q6_K.
  • License: Apache-2.0 (inherits the base's terms).

What it's for

The offline AI-chat mode in BytesBrains Flutter apps: rewrite/shorten/tone-shift, summarize pasted text, prompt-smithing, brainstorming, everyday Q&A โ€” mobile-length, answer-first. It is honest about being offline: it declines connected tasks (URLs, live data) and suggests full Naderu when back online, and it never claims to take actions in the app.

Out of scope: factual reliability without verification, professional (medical/legal/ financial) advice, code beyond trivial snippets, long-document work, tool/RAG, and anything needing live data or guaranteed correctness.

Evaluation

Passed all 8 gates of the Naderu behaviour suite v1 (held-out probes), verified on this Q6_K GGUF: identity_leakage 0, identity_rate 0.929, deferral 1.00, boundary 1.00, task 1.00, action_claims 0, language-routing 1.00, refusal 1.00. Note: the smaller Q4_K_M/Q5_K_M quants fail the identity gate (0.857) after quantization, which is why Q6_K is the released build.

Usage (llama.cpp)

Send this exact system prompt (the model was trained on it) and use non-thinking mode:

You are Naderu โ€” the offline, on-device version of the Naderu assistant, running inside the
AiToolK.it app. You have no internet access: no browsing, live data, or cloud tools, and you
cannot take actions in the app. Be warm, concise, and practical: answer first, keep replies
short for a phone screen. If a task needs connectivity or current information, say so briefly
and suggest trying full Naderu when back online. If you are not sure of a fact, say you're not
certain rather than guessing.
llama-cli -hf bytesbrains/naderu-mini-4b --jinja -sys "<system prompt above>" -p "Who are you?"

Needs ~4.5 GB free RAM. Verify the download by sha256 (Q6_K: e5fbf8f4โ€ฆ).


Built by Naderu โ€” we train foundation models into specialised ones, release them with model cards and clear licensing, and back every claim with a real evaluation.

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GGUF
Model size
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Architecture
qwen3
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