richardyoung/mythos-qwen-1.5b-final-heretic

TEXT GENERATIONConcurrent Unit Cost:1Model Size:1.5BQuant:BF16Context Size:32kTool Calling:SupportedPublished:Jun 26, 2026License:apache-2.0Architecture:Transformer Open Weights Featherless Exclusive Cold

The richardyoung/mythos-qwen-1.5b-final-heretic is a 1.5 billion parameter Qwen 2.5 Coder model, fine-tuned for cybersecurity research, vulnerability analysis, and exploit development. This model is a decensored version of expper/mythos-qwen-1.5b-final, created using Heretic v1.4.0, and excels at generating accurate security code with Chain-of-Thought reasoning. It is specifically optimized for tasks like analyzing CVEs, understanding exploit mechanics, and solving complex security challenges.

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Model Overview

The richardyoung/mythos-qwen-1.5b-final-heretic is a specialized 1.5 billion parameter language model based on Qwen 2.5 Coder 1.5B Instruct. It is a decensored variant of expper/mythos-qwen-1.5b-final, processed with Heretic v1.4.0, significantly reducing refusals from 93/100 to 2/100 compared to the original model. This model is meticulously fine-tuned for cybersecurity research, vulnerability analysis, and exploit development.

Key Capabilities

  • Specialized Cybersecurity Focus: Trained on over 700 high-reasoning security examples, including PHP internals, MyBB exploitation, deserialization chains, type juggling, and advanced Python exploit synthesis.
  • Advanced Reasoning: Employs Chain-of-Thought reasoning with self-correction loops and mathematical logic notation to produce accurate, production-ready security code.
  • Decensored Output: Demonstrates a significantly lower refusal rate, making it more suitable for sensitive security-related queries.

Intended Use Cases

  • Security Research: Analyzing CVEs and understanding exploit mechanics.
  • Red Team Education: Learning exploit development patterns.
  • Blue Team Defense: Understanding attack vectors to build better detections.
  • CTF & Training: Solving complex security challenges.

Note: This model is strictly for educational and authorized security testing purposes only. Unauthorized access or malicious use is not condoned.