DragonBophades/Elster-Vernunft-Qwen3.6-27B

VISIONPricing:Input $1.6 / Cached $0.15 / Output $12Concurrent Unit Cost:2Model Size:27BQuant:FP8Context Size:32kTool Calling:SupportedPublished:Aug 12, 2026License:apache-2.0Architecture:Transformer Open Weights Featherless Exclusive Cold

DragonBophades/Elster-Vernunft-Qwen3.6-27B is a 27 billion parameter Qwen3.6-based model, created by DragonBophades, that integrates the Vernunft reasoning LoRA at full scale. This model significantly reduces the length of internal reasoning by 8.4 times and eliminates first-person self-talk, while maintaining performance on tasks like ARC-Challenge and coding. It is optimized for efficient and structured reasoning, making it suitable for applications requiring concise logical thought processes.

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Elster-Vernunft-Qwen3.6-27B: Efficient Reasoning Model

This model, developed by DragonBophades, is a 27 billion parameter Qwen3.6 variant that merges the Vernunft-Qwen3.6-27B-LoRA at full 1.0 scale. It is designed to drastically reduce the verbosity of the model's internal reasoning processes without compromising accuracy on general reasoning tasks.

Key Capabilities & Differentiators

  • 8.4x Shorter Reasoning: Achieves an 8.4 times reduction in the median length of internal reasoning compared to its base model, Elster.
  • Eliminated R1 Self-Talk: Completely removes first-person self-talk (R1 register) from its reasoning output, resulting in 100% structured reasoning.
  • Performance Preservation: Maintains performance on ARC-Challenge and Hemlock coding tasks, showing no measurable degradation despite the reasoning compression.
  • Full-Scale LoRA Integration: Unlike previous attempts, the Vernunft adapter is integrated at full scale due to its rewritten training data, which prevents performance cliffs.

Important Considerations & Limitations

  • Not for Agentic Tool-Calling: This model is explicitly not recommended for agentic tool-calling applications, as its accuracy in tool selection and argument parsing is significantly reduced.
  • Context-Dependent Reasoning Length: While generally shorter, reasoning length may slightly increase for very short, two-sentence prompts where there is little to compress.

This model is ideal for use cases where concise, structured, and efficient reasoning is paramount, and where agentic tool-use is not a primary requirement.