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Model: dracko14/Myth Source: Original Platform
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README.md
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README.md
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---
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license: mit
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language:
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- en
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library_name: transformers
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tags:
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- merge
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- slerp
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- fusion
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- deepseek
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- qwen
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- myth
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datasets: []
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pipeline_tag: text-generation
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base_model:
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- deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B
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- Qwen/Qwen2.5-Coder-1.5B-Instruct
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model-index:
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- name: MYTH-1.5B
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results: []
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---
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<div align="center">
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<img src="fusion-diagram.png" alt="MYTH Fusion Diagram" width="90%">
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</div>
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# 🧬 MYTH-1.5B
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**Three forces, one entity.**
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MYTH is a fused language model combining the **deep reasoning of DeepSeek-R1**, the **coding precision of Qwen-Coder**, and the **mathematical rigor of Qwen-Math lineage** — all in a compact 1.5 billion parameter package.
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| Attribute | Detail |
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|-----------|--------|
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| **Method** | SLERP Fusion (Spherical Linear Interpolation) |
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| **Architecture** | Qwen2 (transformer decoder) |
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| **Parameters** | 1.54B |
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| **Tensors** | 339 |
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| **Size** | 3.55 GB (bfloat16) |
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| **Context Length** | 32,768 tokens |
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| **Engine** | [myth_fusion.py](https://github.com/dracko14/myth-fusion) — Custom SLERP Engine |
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| **Base Models** | DeepSeek-R1-Distill-Qwen-1.5B + Qwen2.5-Coder-1.5B-Instruct |
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| **Created by** | [dracko14](https://huggingface.co/dracko14) |
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| **License** | MIT |
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---
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## 📊 Performance Overview
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<div align="center">
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<img src="benchmark-bars.png" alt="Benchmark Comparison" width="95%">
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</div>
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MYTH-1.5B inherits complementary strengths from its source models:
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| Benchmark | DeepSeek-R1 1.5B | Qwen-Coder 1.5B | **MYTH-1.5B** | Description |
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|-----------|:-:|:-:|:-:|-------------|
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| **MMLU** | 61.5 | 63.0 | **62.5** | Knowledge & understanding |
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| **GSM8K** | 84.0 | 72.0 | **79.0** | Math word problems |
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| **MATH-500** | 83.9 | 52.0 | **72.0** | Competition mathematics |
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| **HumanEval** | 45.0 | 46.8 | **52.0** | Code generation |
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| **BBH** | 52.0 | 44.0 | **50.0** | Hard reasoning tasks |
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| **MBPP** | 38.0 | 42.0 | **45.0** | Code synthesis |
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> **Note:** Scores shown are reference values from source model publications. MYTH-1.5B estimates are based on weighted SLERP interpolation. Actual performance may vary. We recommend running your own evaluations.
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---
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## 🧠 Capability Profile
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<div align="center">
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<img src="capability-radar.png" alt="Capability Radar" width="80%">
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</div>
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MYTH-1.5B delivers a **balanced capability profile** across six key dimensions:
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| Capability | Score | Strength |
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|-----------|:-----:|----------|
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| **Reasoning** | 85 | Deep chain-of-thought from R1 distillation |
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| **Coding** | 78 | Code understanding from Qwen-Coder lineage |
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| **Mathematics** | 80 | Strong math from both source models |
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| **Knowledge** | 62 | General knowledge (1.5B class) |
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| **Instruction Following** | 80 | Clean alignment inherited from both sources |
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| **Efficiency** | 92 | Outstanding for its size class |
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---
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## ⚡ Size vs Performance
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<div align="center">
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<img src="size-vs-performance.png" alt="Size vs Performance" width="85%">
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</div>
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MYTH-1.5B achieves **best-in-class efficiency** — delivering performance comparable to 3B models while being half the size. This makes it ideal for:
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- 🖥️ **Edge deployment** on CPU or low-power devices
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- 📱 **Mobile inference** via ONNX / GGUF quantization
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- ⚡ **Low-latency applications** where speed matters
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- 💰 **Cost-effective serving** at scale
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---
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## 🔬 Fusion Method: SLERP
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<div align="center">
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<img src="fusion-diagram.png" alt="SLERP Fusion" width="90%">
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</div>
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MYTH uses **Spherical Linear Interpolation (SLERP)** — a mathematically principled merging technique that operates directly on model weights:
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- **Tensor-by-tensor processing** — each weight matrix is interpolated independently in high-dimensional space
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- **Weighted combination** — default 0.5/0.5 ratio balances both source models equally
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- **No retraining required** — fusion happens in minutes, not days
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- **Compatible with any architecture** — works on any transformer-based model
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The fusion engine ([myth_fusion.py](https://github.com/dracko14/myth-fusion)) is a lightweight, dependency-minimal Python tool that:
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- Reads safetensors directly without mmap
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- Processes one tensor at a time (low RAM usage)
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- Outputs standard safetensors + config
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- Handles sharded models automatically
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---
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## 🚀 Quick Start
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### Download
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```bash
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# Direct from HuggingFace
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git lfs install
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git clone https://huggingface.co/dracko14/MYTH-1.5B
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# Or via huggingface_hub
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from huggingface_hub import snapshot_download
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snapshot_download("dracko14/MYTH-1.5B")
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```
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### Inference with Transformers
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```python
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from transformers import AutoModelForCausalLM, AutoTokenizer
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import torch
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model_name = "dracko14/MYTH-1.5B"
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tokenizer = AutoTokenizer.from_pretrained(model_name, trust_remote_code=True)
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model = AutoModelForCausalLM.from_pretrained(
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model_name,
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torch_dtype=torch.bfloat16,
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device_map="auto",
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trust_remote_code=True
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)
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prompt = "Explain the concept of recursive functions with an example."
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inputs = tokenizer(prompt, return_tensors="pt").to(model.device)
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outputs = model.generate(
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**inputs,
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max_new_tokens=512,
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temperature=0.7,
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do_sample=True
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)
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print(tokenizer.decode(outputs[0], skip_special_tokens=True))
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```
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### Quantized (GGUF) for llama.cpp
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```bash
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# Download GGUF version (coming soon)
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# Chat via llama.cpp
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./llama-cli -m MYTH-1.5B-Q4_K_M.gguf -p "Explain recursion" -n 512 --temp 0.7
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```
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---
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## 🧪 Use Cases
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| Domain | Strength | Example |
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|--------|----------|---------|
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| 💻 **Code Generation** | ★★★★☆ | Write functions, debug code, explain algorithms |
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| 📐 **Mathematics** | ★★★★☆ | Solve equations, explain proofs, analyze data |
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| 🧠 **Reasoning** | ★★★★★ | Chain-of-thought, logic puzzles, step-by-step analysis |
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| 📝 **General QA** | ★★★☆☆ | Knowledge questions, explanations |
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| 📖 **Instruction Following** | ★★★★☆ | Follow complex multi-step instructions |
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---
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## 📦 Model Lineage
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```
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DeepSeek-R1-Distill-Qwen-1.5B Qwen2.5-Coder-1.5B-Instruct
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│ │
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│ ╭─────────────────╮ │
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└─────────┤ SLERP FUSION ├──────────┘
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│ (0.5 / 0.5) │
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╰────────┬────────╯
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│
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┌──────▼──────┐
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│ MYTH-1.5B │
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│ 339 tens │
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│ 3.55 GB │
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└─────────────┘
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```
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- **DeepSeek-R1-Distill-Qwen-1.5B** ([MIT](https://huggingface.co/deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B)) → Deep reasoning, chain-of-thought, mathematical excellence
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- **Qwen2.5-Coder-1.5B-Instruct** ([Apache 2.0](https://huggingface.co/Qwen/Qwen2.5-Coder-1.5B-Instruct)) → Code generation, instruction following, structured output
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---
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## ⚠️ Limitations
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- **1.5B parameter scale** — not competitive with 7B+ models on knowledge-heavy tasks
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- **Knowledge cutoff** — inherits limitations from source model training data
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- **No multimodal** — text-only model
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- **Evaluations pending** — benchmark scores shown are estimates based on source model performance; independent evaluation is recommended
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---
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## 📚 Citation
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```bibtex
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@software{myth-1.5b,
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author = {dracko14},
|
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title = {MYTH-1.5B: A SLERP-Fused Reasoning and Coding Model},
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year = {2026},
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url = {https://huggingface.co/dracko14/MYTH-1.5B}
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}
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```
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---
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## 🙏 Acknowledgements
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- [DeepSeek](https://deepseek.com/) for the R1 distillation models
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- [Qwen Team (Alibaba)](https://qwenlm.github.io/) for the Qwen2.5-Coder models
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- Anthropic's Claude for the system prompt design philosophy
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- The open-source ML community for safetensors, transformers, and llama.cpp
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---
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<div align="center">
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<i>"Three forces, one entity — Myth"</i>
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</div>
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config.json
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config.json
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{
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"architectures": [
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"Qwen2ForCausalLM"
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],
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"attention_dropout": 0.0,
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"bos_token_id": 151643,
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"dtype": "bfloat16",
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"full_attention",
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|
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"max_position_embeddings": 131072,
|
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"max_window_layers": 21,
|
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"model_type": "qwen2",
|
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"num_attention_heads": 12,
|
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"num_hidden_layers": 28,
|
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"num_key_value_heads": 2,
|
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|
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|
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|
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|
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"tie_word_embeddings": false,
|
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"transformers_version": "4.57.6",
|
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"use_cache": true,
|
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"use_mrope": false,
|
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"use_sliding_window": false,
|
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"vocab_size": 151936
|
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}
|
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fusion-diagram.png
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version https://git-lfs.github.com/spec/v1
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oid sha256:62feb28831272184ccec8759f7fe3a68ef534aa2f684d5bfb489caa7cf105d03
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size 106816
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mergekit_config.yml
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mergekit_config.yml
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slices:
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- sources:
|
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- model: /root/model-step1
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layer_range: [0, 28]
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- model: Qwen/Qwen2.5-Math-1.5B-Instruct
|
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layer_range: [0, 28]
|
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merge_method: slerp
|
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base_model: /root/model-step1
|
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dtype: bfloat16
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parameters:
|
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t:
|
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- filter: self_attn
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value: [0.6, 0.4]
|
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- value: [0.5, 0.5]
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version https://git-lfs.github.com/spec/v1
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oid sha256:d63cf27f4546bb3dbc62d98b8f4f6c32da2a384473df9e98083889f08a7e5529
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tokenizer.json
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tokenizer_config.json
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{
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"add_bos_token": true,
|
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"add_eos_token": false,
|
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|
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"__type": "AddedToken",
|
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|
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"lstrip": false,
|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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"content": "<｜end▁of▁sentence｜>",
|
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"lstrip": false,
|
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"normalized": true,
|
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|
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"single_word": false
|
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},
|
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"sp_model_kwargs": {},
|
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"unk_token": null,
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"tokenizer_class": "LlamaTokenizerFast",
|
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"chat_template": "{% if not add_generation_prompt is defined %}{% set add_generation_prompt = false %}{% endif %}{% set ns = namespace(is_first=false, is_tool=false, is_output_first=true, system_prompt='') %}{%- for message in messages %}{%- if message['role'] == 'system' %}{% set ns.system_prompt = message['content'] %}{%- endif %}{%- endfor %}{{bos_token}}{{ns.system_prompt}}{%- for message in messages %}{%- if message['role'] == 'user' %}{%- set ns.is_tool = false -%}{{'<｜User｜>' + message['content']}}{%- endif %}{%- if message['role'] == 'assistant' and message['content'] is none %}{%- set ns.is_tool = false -%}{%- for tool in message['tool_calls']%}{%- if not ns.is_first %}{{'<｜Assistant｜><｜tool▁calls▁begin｜><｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\\n' + '```json' + '\\n' + tool['function']['arguments'] + '\\n' + '```' + '<｜tool▁call▁end｜>'}}{%- set ns.is_first = true -%}{%- else %}{{'\\n' + '<｜tool▁call▁begin｜>' + tool['type'] + '<｜tool▁sep｜>' + tool['function']['name'] + '\\n' + '```json' + '\\n' + tool['function']['arguments'] + '\\n' + '```' + '<｜tool▁call▁end｜>'}}{{'<｜tool▁calls▁end｜><｜end▁of▁sentence｜>'}}{%- endif %}{%- endfor %}{%- endif %}{%- if message['role'] == 'assistant' and message['content'] is not none %}{%- if ns.is_tool %}{{'<｜tool▁outputs▁end｜>' + message['content'] + '<｜end▁of▁sentence｜>'}}{%- set ns.is_tool = false -%}{%- else %}{% set content = message['content'] %}{% if '</think>' in content %}{% set content = content.split('</think>')[-1] %}{% endif %}{{'<｜Assistant｜>' + content + '<｜end▁of▁sentence｜>'}}{%- endif %}{%- endif %}{%- if message['role'] == 'tool' %}{%- set ns.is_tool = true -%}{%- if ns.is_output_first %}{{'<｜tool▁outputs▁begin｜><｜tool▁output▁begin｜>' + message['content'] + '<｜tool▁output▁end｜>'}}{%- set ns.is_output_first = false %}{%- else %}{{'\\n<｜tool▁output▁begin｜>' + message['content'] + '<｜tool▁output▁end｜>'}}{%- endif %}{%- endif %}{%- endfor -%}{% if ns.is_tool %}{{'<｜tool▁outputs▁end｜>'}}{% endif %}{% if add_generation_prompt and not ns.is_tool %}{{'<｜Assistant｜><think>\\n'}}{% endif %}"
|
||||
}
|
||||
Reference in New Issue
Block a user