207 lines
5.7 KiB
Markdown
207 lines
5.7 KiB
Markdown
---
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license: apache-2.0
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tags:
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- gguf
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- qwen
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- qwen3-8b
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- qwen3-8b-q6
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- qwen3-8b-q6_k
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- qwen3-8b-q6_k-gguf
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- llama.cpp
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- quantized
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- text-generation
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- reasoning
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- agent
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- chat
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- multilingual
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- imatrix
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- q3_hifi
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base_model: Qwen/Qwen3-8B
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author: geoffmunn
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---
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# Qwen3-8B-f16:Q6_K
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Quantized version of [Qwen/Qwen3-8B](https://huggingface.co/Qwen/Qwen3-8B) at **Q6_K** level, derived from **f16** base weights.
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## Model Info
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- **Format**: GGUF (for llama.cpp and compatible runtimes)
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- **Size**: 6.73 GB
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- **Precision**: Q6_K
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- **Base Model**: [Qwen/Qwen3-8B](https://huggingface.co/Qwen/Qwen3-8B)
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- **Conversion Tool**: [llama.cpp](https://github.com/ggerganov/llama.cpp)
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## Quality & Performance
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| Metric | Value |
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|--------------------|---------------------------------------------------|
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| **Speed** | 🐌 Slow |
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| **RAM Required** | ~5.5 GB |
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| **Recommendation** | Showed up in a few results, but not recommended. |
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## Prompt Template (ChatML)
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This model uses the **ChatML** format used by Qwen:
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```text
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<|im_start|>system
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You are a helpful assistant.<|im_end|>
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<|im_start|>user
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{prompt}<|im_end|>
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<|im_start|>assistant
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```
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Set this in your app (LM Studio, OpenWebUI, etc.) for best results.
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## Generation Parameters
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### Thinking Mode (Recommended for Logic)
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Use when solving math, coding, or logical problems.
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| Parameter | Value |
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|----------------|-------|
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| Temperature | 0.6 |
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| Top-P | 0.95 |
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| Top-K | 20 |
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| Min-P | 0.0 |
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| Repeat Penalty | 1.1 |
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> ❗ DO NOT use greedy decoding — it causes infinite loops.
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Enable via:
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- `enable_thinking=True` in tokenizer
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- Or add `/think` in user input during conversation
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### Non-Thinking Mode (Fast Dialogue)
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For casual chat and quick replies.
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| Parameter | Value |
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|----------------|-------|
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| Temperature | 0.7 |
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| Top-P | 0.8 |
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| Top-K | 20 |
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| Min-P | 0.0 |
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| Repeat Penalty | 1.1 |
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Enable via:
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- `enable_thinking=False`
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- Or add `/no_think` in prompt
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Stop sequences: `<|im_end|>`, `<|im_start|>`
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## 💡 Usage Tips
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> This model supports two operational modes:
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>
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> ### 🔍 Thinking Mode (Recommended for Logic)
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> Activate with `enable_thinking=True` or append `/think` in prompt.
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>
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> - Ideal for: math, coding, planning, analysis
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> - Use sampling: `temp=0.6`, `top_p=0.95`, `top_k=20`
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> - Avoid greedy decoding
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>
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> ### ⚡ Non-Thinking Mode (Fast Chat)
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> Use `enable_thinking=False` or `/no_think`.
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>
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> - Best for: casual conversation, quick answers
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> - Sampling: `temp=0.7`, `top_p=0.8`
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>
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> ---
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>
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> 🔄 **Switch Dynamically**
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> In multi-turn chats, the last `/think` or `/no_think` directive takes precedence.
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>
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> 🔁 **Avoid Repetition**
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> Set `presence_penalty=1.5` if stuck in loops.
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>
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> 📏 **Use Full Context**
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> Allow up to 32,768 output tokens for complex tasks.
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>
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> 🧰 **Agent Ready**
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> Works with Qwen-Agent, MCP servers, and custom tools.
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## Customisation & Troubleshooting
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Importing directly into Ollama should work, but you might encounter this error: `Error: invalid character '<' looking for beginning of value`.
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In this case try these steps:
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1. `wget https://huggingface.co/geoffmunn/Qwen3-8B-f16/resolve/main/Qwen3-8B-f16%3AQ6_K.gguf`
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2. `nano Modelfile` and enter these details:
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```text
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FROM ./Qwen3-8B-f16:Q6_K.gguf
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# Chat template using ChatML (used by Qwen)
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SYSTEM You are a helpful assistant
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TEMPLATE "{{ if .System }}<|im_start|>system
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{{ .System }}<|im_end|>{{ end }}<|im_start|>user
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{{ .Prompt }}<|im_end|>
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<|im_start|>assistant
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"
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PARAMETER stop <|im_start|>
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PARAMETER stop <|im_end|>
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# Default sampling
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PARAMETER temperature 0.6
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PARAMETER top_p 0.95
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PARAMETER top_k 20
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PARAMETER min_p 0.0
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PARAMETER repeat_penalty 1.1
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PARAMETER num_ctx 4096
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```
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The `num_ctx` value has been dropped to increase speed significantly.
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3. Then run this command: `ollama create Qwen3-8B-f16:Q6_K -f Modelfile`
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You will now see "Qwen3-8B-f16:Q6_K" in your Ollama model list.
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These import steps are also useful if you want to customise the default parameters or system prompt.
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## 🖥️ CLI Example Using Ollama or TGI Server
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Here’s how you can query this model via API using `curl` and `jq`. Replace the endpoint with your local server (e.g., Ollama, Text Generation Inference).
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```bash
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curl http://localhost:11434/api/generate -s -N -d '{
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"model": "hf.co/geoffmunn/Qwen3-8B-f16:Q6_K",
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"prompt": "Repeat the following instruction exactly as given: Explain why the sky appears blue during the day but red at sunrise and sunset, using physics principles like Rayleigh scattering.",
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"temperature": 0.4,
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"top_p": 0.95,
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"top_k": 20,
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"min_p": 0.0,
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"repeat_penalty": 1.1,
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"stream": false
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}' | jq -r '.response'
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```
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🎯 **Why this works well**:
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- The prompt is meaningful and demonstrates either **reasoning**, **creativity**, or **clarity** depending on quant level.
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- Temperature is tuned appropriately: lower for factual responses (`0.4`), higher for creative ones (`0.7`).
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- Uses `jq` to extract clean output.
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> 💬 Tip: For interactive streaming, set `"stream": true` and process line-by-line.
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## Verification
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Check integrity:
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```bash
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sha256sum -c ../SHA256SUMS.txt
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```
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## Usage
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Compatible with:
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- [LM Studio](https://lmstudio.ai) – local AI model runner with GPU acceleration
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- [OpenWebUI](https://openwebui.com) – self-hosted AI platform with RAG and tools
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- [GPT4All](https://gpt4all.io) – private, offline AI chatbot
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- Directly via `llama.cpp`
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Supports dynamic switching between thinking modes via `/think` and `/no_think` in multi-turn conversations.
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## License
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Apache 2.0 – see base model for full terms.
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