sov34-1.5b โ€” EXPERIMENTAL (dual-gate candidate: FAILED gate 2, published with failures included)

Register: measurement/attestation only. This model makes no capability claims. Read the numbers before use.

LoRA (r16) on Qwen2.5-1.5B, trained on 4,853 governance-corpus rows (eval_loss 0.821). This was a candidate successor to sov33-unified under a dual-gate rule: beat it on generality AND on the frozen governance split, or make no claims. Gate 2 failed. We publish the data anyway โ€” failures included is the point of the measurement platform.

Measured gates (identical 170 held-out items, frozen split v1, set-F1)

Model set-F1 CI95 (BCa n=2000)
sov33-unified 0.2508 [0.221, 0.283]
sov34 (this model) 0.1975 [0.169, 0.226]
base qwen2.5-1.5b 0.1767 [0.151, 0.205]

Generality (lm-eval arc_easy, validated hf lane): sov34 0.7504 ยฑ 0.0089; base 0.7551 ยฑ 0.0088 (preserved within noise). sov33-unified for contrast: 0.2534 (near-random โ€” disclosed specialist profile).

Verdict

Gate 1 (generality): PASS. Gate 2 (governance frozen split): FAIL vs 0.2508. Dual-gate NOT MET. The LoRA nudged governance retrieval above its own base but does not match the specialist. Consistent with the published canon: closed-book small models cannot hold statutory citation โ€” retrieval grounding is required, not optional.

What this model is for

Experimentation, reproduction, router-substrate research (a 1.5B that keeps generality while carrying governance signal). NOT for compliance decisions, NOT a certified anything.

Reproduce

Harness + results: HF dataset csoai/aiact-frozen-split-harness (incl. sov34_dualgate_triangulation_2026-08-03.json). Triangulation: sov33-unified / sov34 / base on byte-identical item sets.

Lane warning

All numbers measured via validated lanes only (lm_eval --model hf; direct ollama /api/generate; OpenRouter API). The llama.cpp llama-server + lm_eval local-completions lane was invalidated 2026-08-03 (instrument fault; see csoai/lmeval-official-format INVALIDATED.md).

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qwen2
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Dataset used to train csoai/sov34-1p5b