Standard One 8B — GGUF

GGUF builds of Standard One 8B (Ministral 3 8B text + Pixtral vision tower, mistral3 architecture) for use with llama.cpp.

Files

Most quant levels below (marked "imatrix") were built with an importance matrix calibrated on 1,508 prompts sampled from our own training rows (see "Importance-matrix calibration" below), which recovers some of the accuracy quantization would otherwise lose. Q8_0 and BF16 don't need one.

File Quant Size imatrix
StandardOne-8B-BF16.gguf BF16 (no quantization) 17.0 GB —
StandardOne-8B-Q8_0.gguf Q8_0 9.0 GB no
StandardOne-8B-Q5_K_M.gguf Q5_K_M 6.1 GB yes
StandardOne-8B-Q4_K_M.gguf Q4_K_M 5.2 GB yes
StandardOne-8B-IQ4_XS.gguf IQ4_XS 4.7 GB yes
StandardOne-8B-Q3_K_M.gguf Q3_K_M 4.2 GB yes
StandardOne-8B-IQ3_M.gguf IQ3_M 4.0 GB yes
StandardOne-8B-Q2_K.gguf Q2_K 3.4 GB yes
StandardOne-8B-IQ2_M.gguf IQ2_M 3.1 GB yes
mmproj-StandardOne-8B.gguf F16 vision projector 857 MB —

SHA256 checksums: SHA256SUMS. Source revisions, conversion tool version and full validation numbers: release-manifest.json.

Q4_K_M note: this is the imatrix-calibrated version, not a plain quantization. We generated both and shipped whichever scored higher on hard+original combined (imatrix 148.08 vs. plain 148.08) — see the accuracy table below.

Usage

Text-only:

llama-cli -m StandardOne-8B-Q4_K_M.gguf -ngl 99 -p "Your prompt"

With vision (image input):

llama-server -m StandardOne-8B-Q4_K_M.gguf --mmproj mmproj-StandardOne-8B.gguf -ngl 99

The GGUF's own embedded chat template (converted from the model's chat_template.jinja) is applied automatically; no extra flags needed for chat formatting.

Importance-matrix calibration

Q5_K_M down to IQ2_M were quantized with llama-imatrix calibrated on 1,508 prompts (58 per cohort across 26 training-data cohorts; training data only — no benchmark/held-out file was used), context 2048. Q8_0 and BF16 don't use an imatrix (high enough precision that it doesn't move the needle).

Validation

Accuracy was checked by comparing next-token logits over the option letters on the JevBench public suites (easy/original/hard) against the served BF16 baseline; see release-manifest.json for full methodology and gguf-validation.md (in the release kit) for the complete writeup. Measured (accuracy %, n=48/72/111 for easy/original/hard; prefill tokens/sec is the mean over the 231 scored decisions):

Quant Easy Original Hard Overall Prefill tok/s
served BF16 (reference) 100.0 94.44 54.95 — —
BF16-GGUF 100.0 95.83 52.25 75.76 11,514
Q8_0 100.0 95.83 51.35 75.32 5,922
Q5_K_M 100.0 97.22 54.95 77.49 4,455
Q4_K_M (shipped, imatrix) 100.0 95.83 52.25 75.76 2,067
IQ4_XS 100.0 95.83 53.15 76.19 2,260
Q3_K_M 100.0 98.61 54.95 77.92 5,463
IQ3_M 100.0 97.22 55.86 77.92 5,772
Q2_K 100.0 97.22 51.35 75.76 3,973
IQ2_M 100.0 91.67 54.05 75.32 2,478

Note on the mmproj conversion

llama.cpp's stock --mmproj converter (as of the commit used here) drops the [IMG_BREAK] token embedding for HF-format Mistral3ForConditionalGeneration checkpoints (a filter meant to strip text-model tensors also strips the one row of the text embedding matrix the vision projector needs), so the mmproj file it produces fails to load in llama-server/llama-cli ("unable to find tensor v.token_embd.img_break"). The mmproj file in this folder was built with a small local patch that lets that one tensor through; see release-manifest.json -> known_issues_fixed for details. It loads and runs correctly with --mmproj.

License

Apache License 2.0 — see LICENSE and NOTICE. Same terms as the source StandardOne-8B release; this GGUF conversion adds no additional restrictions.

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