Charty-1B

Charty-1B

A compact text-to-Mermaid diagram generation model fine-tuned from Liquid AI's LFM2.5-1.2B-Instruct, built for on-device and mobile deployment. Give it a natural-language description and Charty-1B outputs raw Mermaid syntax only — no explanations, no markdown fences, no conversational filler.

This repository contains the merged full model in 16-bit safetensors format. For quantized GGUF versions (F16 / Q8 / Q4K_M), see ali-thowfeek/Charty-1B-GGUF

🗒️ Model Details

💬 Chat Template (Unsloth's Fixed Template)

This model ships with Unsloth's fixed Jinja chat template, inherited from the base repo.

The same template is embedded in the GGUF builds (see the GGUF repo) and is applied automatically by llama.cpp with --jinja.

🎯 Intended Use

Generate Mermaid diagram syntax (flowcharts, sequence, class, state, ER, Gantt, pie, git graphs, mindmaps, quadrant charts, …) from plain-text prompts. Run on low-end hardware: mobile phones, edge devices, laptops, embedded systems. Power apps that need offline, private, diagram-as-code generation.

What it does

Input (user prompt): Create a flowchart showing the user login process with MFA verification.

Output (model response):

graph TD
    A[User Visits Login Page] --> B[Enter Credentials]
    B --> C{Credentials Valid?}
    C -->|No| D[Show Error Message]
    D --> B
    C -->|Yes| E[Send MFA Code]
    E --> F[Enter MFA Code]
    F --> G{MFA Valid?}
    G -->|No| H[Show MFA Error]
    H --> F
    G -->|Yes| I[Grant Access]

The model outputs only the Mermaid syntax code. No wrapping text, no mermaid fences.

🏃 Inference

Recommended Generation Parameters

📦 GGUF / Quantized Versions

For CPU-only inference, mobile deployment, or use with llama.cpp / Ollama / LM Studio:

👉 ali-thowfeek/Charty-1B-GGUF

📊 Training Details

📜 License

This model is a derivative work of LFM2.5-1.2B-Instruct by Liquid AI and is released under the LFM Open License v1.0.

Key terms:

• ✅ Free for research, personal, and non-commercial use.
• ✅ Commercial use permitted for entities with < $10M annual revenue.
• ❌ Commercial use by entities with ≥ $10M annual revenue is not licensed.
• You must include a copy of the LICENSE with any redistribution.
• You must retain all copyright and attribution notices.

See the full LICENSE file in this repository for complete terms.

📚 Citation

If you use this model, please cite the base model and this work:

@article{liquidai2025lfm2,
  title   = {LFM2 Technical Report},
  author  = {Liquid AI},
  journal = {arXiv preprint arXiv:2511.23404},
  year    = {2025}
}

@misc{thowfeek2026charty,
  title  = {Charty-1B: A Text-to-Mermaid Diagram Generation Model},
  author = {ali-thowfeek},
  year   = {2026},
  url    = {https://huggingface.co/ali-thowfeek/Charty-1B}
}

🙏 Acknowledgements

• Liquid AI — LFM2.5 base model
• Unsloth — 2× faster fine-tuning framework
• Celiadraw — Original text-to-mermaid dataset source
• Hugging Face — TRL library and model hosting