Qwen2.5-3B-GrugSpeech-Native

Qwen2.5-3B-GrugSpeech-Native is an ultra-dense, invariant-anchored reasoning model fine-tuned on NVIDIA A100 using native BF16 QLoRA and evaluated under the Energy-Based Fine-Tuning (EBFT) paradigm.

It compresses verbose Chain-of-Thought (CoT) trajectories into structured, caveman-style reasoning primitives (<think>...Done.</think>), eliminating token bloat, conversational filler, and rhetorical hedging without sacrificing mathematical invariants, tool dispatch accuracy, or code logic.


Key Highlights

  • 60.52% End-to-End Token Reduction on 500 unseen official GSM8K test problems (collapsing average reasoning + response from 256.0 tokens to 101.1 tokens).
  • Statistically Indistinguishable Reasoning Accuracy: 44.8% Grug vs 45.8% Base on 500 GSM8K problems ($z = 0.318$, $p = 0.7508$, zero statistically significant degradation).
  • 100% Tool Calling Precision: Achieved 100.0% valid JSON dispatch on standardized tool-use benchmarks (vs 73.3% base Qwen2.5-3B).
  • Anti-Overthinking on Low-Complexity Prompts: 94.83% pass rate on casual/short prompts (vs 79.31% base), entirely eliminating paragraph-long preambles for simple questions.
  • Strict Syntactic Compliance: 99.38% strict adherence to <think>...Done.</think> enclosing tags across multi-turn queries.
  • 65.0% EBFT Trajectory Energy Reduction: Minimized path cost $E(x,y) = lpha \cdot ext{Len}(y) + eta \cdot H(y) + \gamma \cdot ext{Violations}(y)$ from 55.01 to 19.25.

Benchmark Leaderboard

1. Large-Scale Unbiased Benchmark (500 Official GSM8K Test Problems)

Evaluated across 500 unseen problems from the official GSM8K test split:

Metric Base Qwen2.5-3B Grug Reasoner (Ours) Delta / Efficiency
Pass Accuracy 45.80% (229/500) 44.80% (224/500) $-1.00%$ ($p = 0.7508$, statistically tied)
95% Confidence Interval $[41.48%, 50.18%]$ $[40.50%, 49.18%]$ Complete CI Overlap
Mean Total Tokens 256.0 tok 101.1 tok -60.52% (-154.9 tokens/problem)
Token Compression Ratio 1.00x 2.53x 2.53x Faster Generation
Total Test Tokens Emitted 127,998 tok 50,535 tok -77,463 tokens saved

2. Standardized 160-Item Multi-Field Scaled Suite

Spans 5 domains (Math, Tool Use, Code, Science/Logic, Adversarial Robustness) across 3 prompt complexity tiers:

Domain / Split Base Qwen2.5-3B Grug Reasoner (Ours) Delta
Overall Pass Rate 78.75% 80.62% +1.87%
Tool Calling Accuracy 73.33% 100.00% +26.67%
Adversarial Robustness 80.00% 83.33% +3.33%
Code Generation 80.00% 83.33% +3.33%
Low-Detail Prompts (<25 words) 79.31% 94.83% +15.52%
Syntactic Tag Adherence 0.00% 99.38% +99.38%

Available GGUF Files

Filename Quantization Size Recommended Use Case
Qwen2.5-3B-GrugSpeech-Q4_K_M.gguf Q4_K_M 1.80 GB Fast local edge inference, Apple Silicon, mobile/laptop
Qwen2.5-3B-GrugSpeech-Q8_0.gguf Q8_0 3.06 GB Full fidelity, maximum numerical precision

Deployment & Quick Start

Option 1: Ollama

  1. Download the Modelfile and Q4_K_M GGUF:
ollama create grug-qwen3b -f Modelfile
ollama run grug-qwen3b "How do I calculate compound interest on $5000 at 5% for 3 years?"

Sample output:

<think>
Principle: 5000. Rate: 0.05. Years: 3.
Formula: A = P(1 + r)^t.
5000 * (1.05)^3 = 5000 * 1.157625 = 5788.125.
Interest = 5788.13 - 5000 = 788.13.
Done.
</think>
Final amount is $5,788.13. Total compound interest earned is $788.13.

Option 2: llama.cpp

./llama-cli -m Qwen2.5-3B-GrugSpeech-Q4_K_M.gguf   -p "<|im_start|>system
You are Grug Reasoner. Think in caveman logic inside <think>...</think>.<|im_end|>
<|im_start|>user
Convert binary 110101 to decimal.<|im_end|>
<|im_start|>assistant
<think>
"   -n 256 --temp 0.2

Citation & Reference

@misc{grugspeech2026,
  title={Grug Speech Reasoning: Energy-Based Invariant Distillation for Token-Efficient Reasoning},
  author={Nov4Saki and Collaborators},
  year={2026},
  publisher={Hugging Face},
  howpublished={\url{https://huggingface.co/Novasaki/Qwen2.5-3B-GrugSpeech-Native}}
}
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