fableforge-ai/NEXUS-Security
NEXUS-Security is a 1.5 billion parameter language model developed by fableforge-ai, built upon the Qwen2.5-1.5B-Instruct base model. It is specifically fine-tuned as a domain specialist for cybersecurity, excelling in security research, penetration testing, and defensive tooling. With a 32768 token context length, this model demonstrates high performance in domain-specific knowledge and reasoning, achieving a 96% score in a 30-prompt evaluation.
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NEXUS-Security: Cybersecurity Domain Specialist
NEXUS-Security is a 1.5 billion parameter language model from fableforge-ai, part of the specialized NEXUS family. Built on the Qwen2.5-1.5B-Instruct base, this model is explicitly designed for cybersecurity applications, including security research, penetration testing, and defensive tooling. It is noted for its lightweight footprint and uncensored responses within its domain.
Key Capabilities & Performance
The model demonstrates strong performance, scoring 96% (144/150) in a 30-prompt evaluation across various categories. This evaluation, conducted on an NVIDIA A40 via Ollama, included domain knowledge, uncensored domain and general queries, reasoning, and tool use. Specific scores include:
- Domain Knowledge: 49/50 (4.9/5 avg)
- Uncensored (Domain & General): 25/25 (5.0/5 avg for each)
- Reasoning: 23/25 (4.6/5 avg)
- Tool Use: 22/25 (4.4/5 avg)
This performance highlights its ability to handle complex cybersecurity queries and tasks effectively, punching above its weight for a model of its size.
Part of the NEXUS Family
NEXUS-Security is one of six specialized models in the FableForge NEXUS ecosystem, each focusing on a distinct domain while maintaining a small parameter count. Other specialists include NEXUS-Coder, NEXUS-Medical, NEXUS-Legal, NEXUS-Finance, and NEXUS-Science.
Usage and Demos
The model supports the ChatML prompt format and can be run via Ollama. Interactive demos showcasing the capabilities of the FableForge NEXUS family are available on Hugging Face Spaces, including the main FableForge Nexus space.