DahonoLabs/Dahono-4B
Dahono-4B is a 4.5 billion parameter sovereign legal AI model developed by DahonoLabs, built on the Qwen3.5-4B-Base architecture with a 32K context length. It is specifically optimized for Indonesian legal reasoning, regulatory compliance, and juridical instrument analysis. The model integrates multimodal vision capabilities for document inspection (e.g., contracts, signatures, stamps) and is enhanced through Reasoning Reinforcement Learning (GRPO) with four calibrated juridical reward functions. It excels at providing accurate legal analysis and citation precision within the Indonesian legal framework.
Loading preview...
Dahono-4B: Sovereign Indonesian Legal AI with Multimodal Vision
Dahono-4B is a 4.5 billion parameter foundation model developed by DahonoLabs, specifically engineered for the Indonesian legal domain. Built upon the robust Qwen3.5-4B-Base architecture, this model integrates multimodal vision capabilities, allowing it to process visual inputs like scanned legal documents to validate contract conditions, signatures, and stamp duties (UU No. 10/2020).
Key Differentiators & Capabilities
- Specialized Legal Reasoning: Optimized through Reasoning Reinforcement Learning (GRPO) using four distinct juridical reward functions (Format Compliance, Language Purity, Citation Precision, Reasoning Depth) to ensure high accuracy and adherence to legal standards.
- Enhanced Performance: Version v0.8 shows significant improvements, achieving an 89.40% Composite Legal Score and 89.80% Doctrinal Accuracy on Indonesian legal benchmarks, a +5.80% increase over v0.7.
- Pure Indonesian Legal Language: The internal reasoning process (
<think>blocks) is 100% in standard Indonesian legal language, eliminating code-switching issues found in previous versions. - Extensive Training Corpus: Trained on an expanded corpus of 6,271 samples, including 4,500 Chain-of-Thought reasoning samples and 1,771 juridical glossary terms.
- Vision-Ready: Capable of auditing legal documents visually, verifying elements like Article 1320 KUHPerdata conditions, signature validity, and Rp 10,000 stamp duty compliance.
Ideal Use Cases
- Legal Research & Document Review: Accelerating the analysis of Indonesian positive law and regulatory compliance pre-checks.
- Drafting Legal Instruments: Assisting in the formulation of initial legal drafts such as summons, cooperation agreements, and formal advocate correspondence.
- Legal Education: Serving as an educational tool for legal academics and practitioners.
- Multimodal Document Audit: Automating the verification of physical legal document elements like signatures and stamps.