Gemma 4 26B-A4B IT — IQ2_M (domain imatrix)

Custom IQ2_M quantization of google/gemma-4-26B-A4B-it with a domain-mixed importance matrix (45% code, 45% agentic, 10% general).

  • Size: 9.7 GB (smaller than the 31B dense at 10.4 GB)
  • BPW: 3.29
  • Architecture: Gemma 4 MoE — 128 experts, 8+1 active per token, 25.2B total / 3.8B active

Benchmark results (reasoning OFF)

Note on BFCL scores: All BFCL scores reported here use our internal simplified evaluation (single-function-call subset with custom prompt/scoring), NOT the official Berkeley Function Calling Leaderboard methodology. Our scores are not directly comparable to the official leaderboard. We are working on running the official BFCL evaluation for comparable numbers.

Model Size Active HumanEval+ MBPP+ BFCL v3 NL2Bash F1
Gemma 4 31B IQ2_M 10.4 GB 31B 88.41% 82.01% 92.25% 84.71%
This model (26B MoE IQ2_M) 9.7 GB 3.8B 80.49% 77.78% 92.75% 79.64%
Qwen3.6 IQ2_M 11.1 GB 3B 80.49% 78.31% 94.75% 81.63%
Gemma 4 E4B Q8_0 7.8 GB 4.5B 73.78% 73.28% 93.75% 79.75%

Key findings

  • BFCL 92.75% — beats the 31B dense (92.25%) with 0.7 GB less and 8x fewer active params
  • HumanEval+ 80.49% — ties Qwen3.6 IQ2_M at comparable size
  • MoE expert isolation provides natural quantization resilience, as predicted by our specialization boundary study
  • All benchmarks run with reasoning OFF; thinking mode expected to add +5-15pt on code tasks

Quickstart

huggingface-cli download KikoCis/gemma-4-26B-A4B-it-IQ2_M-GGUF gemma4-26b-a4b-IQ2_M.gguf --local-dir .

# Without thinking
llama-cli -m gemma4-26b-a4b-IQ2_M.gguf -ngl 99 --ctx-size 8192 --temp 0.1 \
  -p "Write a Python function to merge two sorted lists"

# With thinking (recommended for complex tasks)
llama-cli -m gemma4-26b-a4b-IQ2_M.gguf -cnv -ngl 99 --ctx-size 8192 \
  --reasoning on --reasoning-budget 1024

Files

  • gemma4-26b-a4b-IQ2_M.gguf — quantized weights (9.7 GB)
  • gemma4-26b-a4b-domain.imatrix — importance matrix

Related

License

Apache 2.0.


Real-World Agent Test Warning (April 2026)

Benchmark scores do not predict agent capability. In Docker-based autonomous testing, fine-tuned E4B models (95% BFCL) scored 0/10 while the unfine-tuned base scored 6/10. Fine-tuning for BFCL destroyed general reasoning (error recovery, strategy adaptation, anti-repetition). Fine-tuned E4B models have been withdrawn.

For autonomous agent tasks, use the base Gemma 4 model or a larger model at higher BPW. See: The Benchmark Trap — Full Study

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