Standard One 8B — GGUF

Updated weights (v2, 2026-09-26). These files are built from Standard One 8B v2. If you downloaded them before, download them again or pin revision="v2". Earlier versions stay available under the tags v1 and v1.1.

Version: v2

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 1,512 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 chose whichever scored higher on the mean of 10 held-out and public-dataset decision suites (no JevBench items; imatrix 76.56 vs. plain 76.33).

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 1,512 prompts (42 per cohort across 36 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 93.06 54.95 — —
BF16-GGUF 97.92 97.22 54.05 76.62 3,771
Q8_0 97.92 97.22 54.05 76.62 2,590
Q5_K_M 97.92 97.22 56.76 77.92 1,914
Q4_K_M (shipped, imatrix) 97.92 97.22 54.95 77.06 1,984
IQ4_XS 97.92 97.22 57.66 78.35 2,446
Q3_K_M 97.92 98.61 53.15 76.62 1,824
IQ3_M 100.0 97.22 56.76 78.35 2,185
Q2_K 100.0 95.83 54.95 77.06 1,732
IQ2_M 100.0 90.28 54.05 74.89 1,927

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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