fableforge-ai/NEXUS-Legal

TEXT GENERATIONConcurrent Unit Cost:1Model Size:1.5BQuant:BF16Context Size:32kTool Calling:SupportedPublished:Jul 5, 2026License:apache-2.0Architecture:Transformer0.0K Open Weights Featherless Exclusive Cold

NEXUS-Legal is a 1.5 billion parameter instruction-tuned causal language model developed by fableforge-ai, built upon Qwen2.5-1.5B-Instruct. Optimized for legal analysis and contract review, this model offers specialized domain knowledge within a lightweight footprint. It achieves a 93% score on a 30-prompt evaluation covering domain knowledge, reasoning, and tool use, demonstrating strong performance for its size. With a 32768 token context length, it is designed for efficient legal-specific applications.

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NEXUS-Legal: Specialized AI for Law & Compliance

NEXUS-Legal is a 1.5 billion parameter language model from the FableForge ecosystem, specifically fine-tuned for legal analysis and compliance tasks. Built on the Qwen2.5-1.5B-Instruct base, it offers a powerful yet lightweight solution for legal professionals.

Key Capabilities

  • High Domain Knowledge: Achieves 4.6/5 in domain-specific evaluations, demonstrating deep understanding of legal concepts.
  • Strong Reasoning: Scores 4.8/5 in reasoning tasks, crucial for complex legal interpretations.
  • Effective Tool Use: Rated 4.2/5 for tool integration, enabling practical application in legal workflows.
  • Uncensored Domain & General Responses: Provides direct and comprehensive answers without artificial restrictions in both legal and general contexts.
  • Lightweight & Efficient: As part of the NEXUS family, it's designed to perform "punching far above its weight" with a small parameter count, making it suitable for resource-constrained environments.

Benchmarks

NEXUS-Legal scored 139/150 (93%) in a 30-prompt evaluation conducted on an NVIDIA A40 via Ollama. This includes specific scores for:

  • 🎯 Domain Knowledge: 46/50
  • 🔓 Uncensored (Domain): 24/25
  • 🔓 Uncensored (General): 24/25
  • 🧠 Reasoning: 24/25
  • 🔧 Tool Use: 21/25

Good For

  • Legal Analysis: Interpreting legal documents, statutes, and case law.
  • Contract Review: Identifying key clauses, obligations, and potential risks in contracts.
  • Compliance Checks: Assisting with regulatory compliance and policy adherence.
  • Legal Research: Providing quick and accurate answers to legal queries.
  • Specialized Legal AI Applications: Developing custom AI tools for specific legal niches where a focused, efficient model is required.

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1 models