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bosun-v3.1-0.6b (DecisionBench aaa9dd06)

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bosun-v3.1-0.6b (DecisionBench aaa9dd06) is an open-weights decision model from Hanno Labs, released 22 September 2026. Its published size is 0.6B parameters. Licence: apache-2.0.

Catalogue identity notes

DecisionBench v1 comparison: Hanno-Labs/bosun-v3.1-0.6b, revision aaa9dd06d4d6501b33df61942472fed9284bc5e6; decision-model; adapter bosun-decision-prompt-v3-stable-slots; probability source native_full_candidate_logits. Kept separate from newer or unpinned Decision Index recipes; standard prompt, not compact. No unverified runtime or OpenRouter price imported. Current repository metadata checked separately; an unpinned alias is not evidence that today’s weights reproduce this historical run.

Model information sources

Release date ↗ · Weights licence ↗ · Parameter count ↗

Published served parameter count; not a RAM or download-size measurement.

64.1±1.8#65 of 355 decision modelsfrom 27 benchmark results across 1 source

$ how it compares

The decision models ranked either side of bosun-v3.1-0.6b (DecisionBench aaa9dd06), out of 357 with a score, then more from Hanno Labs.

#modelscorewhereRAMreleased
63Jev 1.14 TypeSafe64±1api $0.042/M input tokens2026-10-14
64Jeffan-4B-2010 tattrongvu64±1model files
65bosun-v3.1-0.6b (DecisionBench aaa9dd06) Hanno Labs64±2model files2026-09-22
66Bobcat 1.3 (31B) sanghwa-na64±1model files2026-10-11
67AnyJev L0 · Gemma-4-31B (decision readout) MorrisZJ64±1source code
more from Hanno Labs
42bosun-v3.1-1.7b (DecisionBench 2ef2d972) Hanno Labs67±2model files
316Bosun v3.1 1.7B LoRA Hanno Labs29±1model files
330Bosun v3.1 0.6B LoRA Hanno Labs25±1model files2026-09-22

see all decision models · find the ones that fit your machine

$ what it's good at

workflows▁▁▁▂▁▂▂▆█▄▁▁ #10 of 114 · 99% of its score · 27 tests

Beats baselabs mammoth-1 (27B), Nace.AI Drex Max v1 (27B), Perplexity Decider v1.2 (27B) here, though they rank higher overall. Trails Microsoft-Decision-1 here, though they rank lower overall.

testresultvs the others in its rundifficultycountswhy
DecisionBench v1 · action selection (all-request accuracy) submitted66.9% ✎▂▁▂▃▄▃▁▁▂█▇▄ beats 55/56medium · avg 51%▇▇▇▇▇▇▇▇▇ 22%at its level
DecisionBench v1 · routing (all-request accuracy) submitted74.0% ✎▁▁▁▁▂▂▁▁▁▁▃█ beats 40/56medium · avg 64%▇▇▇▇▇ 12%sharp
DecisionBench v1 · record classification (all-request accuracy) submitted47.0% ✎▃▂▁▂▂▂▄▁▃▆██ beats 45/56medium · avg 39%▇▇▇▇ 11%at its level
DecisionBench v1 · navigation (all-request accuracy) submitted71.0% ✎▁▁·▃▁▁▁▁▁▁▃█ beats 41/56medium · avg 58%▇▇▇▇ 10%sharp
DecisionBench v1 · verification (all-request accuracy) submitted60.5% ✎▁▁▅▁▃▂▂▁▁▇▇█ beats 40/56medium · avg 56%▇▇▇ 7.0%blunt · at its level
DecisionBench v1 · document record classification (all-request accuracy) submitted66.8% ✎▂▂·▁▂▄▃▆▄█▁▃ beats 55/56medium · avg 46%▇▇ 5.9%at its level
DecisionBench v1 · rubric scoring prioritization (all-request accuracy) submitted70.3% ✎▁▁▅▅▃▃▅█▃▃·▃ beats 55/56medium · avg 45%▇▇ 5.0%at its level
DecisionBench v1 · triage (all-request accuracy) submitted94.0% ✎▁·▁·▂▃▄▃▂█▄▃ beats 56/56easy · avg 78%▇ 3.4%sharp
19 more tests
testresultvs the others in its rundifficultycountswhy
DecisionBench v1 · review scoring (all-request accuracy) submitted69.0% ✎▁······▂▃▅▇█ beats 55/56medium · avg 52%▇ 3.2%at its level
DecisionBench v1 · content classification (all-request accuracy) submitted80.0% ✎▁····▁▁▁▁▁▁█ beats 51/56easy · avg 73%▇ 2.8%typical
DecisionBench v1 · completion assessment (all-request accuracy) submitted95.0% ✎▁▁▂▃▄·▂▁▁▆█▃ beats 54/56very easy · avg 86%▇ 2.7%sharp · maxed out
DecisionBench v1 · target selection (all-request accuracy) submitted41.0% ✎▁▁·▁▁▁▃▁▂▁▁█ beats 37/56hard · avg 29%▇ 2.7%at its level · noisy
DecisionBench v1 · retrieval ranking (all-request accuracy) submitted55.0% ✎▁▁·▁▁▂▃▂▃▁▁█ beats 39/56medium · avg 35%▇ 2.7%at its level · noisy
DecisionBench v1 · risk scoring (all-request accuracy) submitted74.0% ✎▁▁·▁▂▂▁▃▃█▇▃ beats 55/56medium · avg 62%▇ 2.0%blunt · at its level
DecisionBench v1 · bounded extraction (all-request accuracy) submitted96.0% ✎▃▃▂·▁▁▁▁▁▁█▅ beats 55/56very easy · avg 86%▇ 1.9%sharp · maxed out · noisy
DecisionBench v1 · reasoning (all-request accuracy) submitted43.1% ✎▂·▁▁▆█▅▃▃▂▁▁ beats 27/56medium · avg 52%▇ 1.3%at its level
DecisionBench v1 · document workflows (all-request accuracy) submitted91.4% ✎█▄▃▁▁▃▂▂▁·▃▁ beats 55/56easy · avg 66%▇ 0.8%blunt · at its level
DecisionBench v1 · retrieval verification (all-request accuracy) submitted91.3% ✎█▁▂▁▁▁▁▁▂▅▁▃ beats 55/56easy · avg 74%▇ 0.7%noisy
DecisionBench v1 · guardrails moderation (all-request accuracy) submitted63.5% ✎▁▁▁▂▆▃▃█···▁ beats 52/56medium · avg 52%▇ 0.6%blunt · at its level · noisy
DecisionBench v1 · document classification (all-request accuracy) submitted25.0% ✎▂▁·▂▁▁▁▄▁▂▃█ beats 33/56hard · avg 21%▇ 0.4%blunt · at its level · noisy
DecisionBench v1 · safety gating (all-request accuracy) submitted96.0% ✎▂·····▆█▂▂▄▇ beats 46/56easy · avg 77%▇ 0.4%noisy
DecisionBench v1 · semantic filtering (all-request accuracy) submitted90.0% ✎▁·▁▁·▁▁█▂▃█▃ beats 55/56easy · avg 71%▇ 0.3%blunt · noisy
DecisionBench v1 · context management (all-request accuracy) submitted94.0% ✎▁·····▁▇▆▁█▃ beats 55/56easy · avg 73%▇ 0.2%blunt · noisy
DecisionBench v1 · content moderation (all-request accuracy) submitted100.0% ✎▁····▃▅▃▂▂·█ beats 56/56easy · avg 82%▇ 0.2%noisy
DecisionBench v1 · entity alignment (all-request accuracy) submitted99.9% ✎▁·▁▄▇▄▅▄▂▁▄█ beats 55/56easy · avg 66%▇ 0.2%noisy
DecisionBench v1 · function agent skill routing (all-request accuracy) submitted97.3% ✎▃▃▄▅▆▂▅▄▃▄█▃ beats 49/56easy · avg 68%▇ 0.1%blunt · noisy
DecisionBench v1 · routing triage (all-request accuracy) submitted86.1% ✎█▁···▁·▂▆▅▂▃ beats 53/56medium · avg 42%▇ 0.0%blunt · at its level · noisy

$ where to run it

Download model files ↗
Published model files verified. Includes adapters or readout weights; follow the model documentation for the required base model. This is the revision recorded by the benchmark. A local run command and hardware requirements have not been verified for this entry. Source · checked 2026-10-31.

Model repository and documentation: huggingface.co/Hanno-Labs ↗

$ how the score was worked out · Hanno Labs DecisionBench v1 r… 99%

Each result implies a score on its own, after adjusting for how hard its test is and who ran it. The score is their weighted average, with a small pull toward the middle for thinly tested models. Each test's weight is its counts column above; here it's added up by who ran the tests. How it works

sourceresultsshare of the scorelicence
Hanno Labs DecisionBench v1 reviewed results · submitted; independent execution unverified27CC0 1.0
prior · pull toward the middle
weighted average= 64.1

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