# LITE5-180: Pack retrieval reach for the lite tier

> Living preprint · as of 2026-10-25 · map node X-176 (experiment) · interim record, not a final result.

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- [X-176] LITE5-180 · Pack retrieval reach for the lite tier · question: Pack retrieval reach for the lite tier (HEADPASS-X2b on Qwen3-1.7B Q4_K_M; LITE5 → LITE5-180) · result: +0.071 (+0.048…+0.094) · set 180 public self-tests (dev), 1 seed, both arms regenerated on the MacBook, Haiku 5.5-low N = 4 both orders, 720 calls, 0 Opus, 0 paid; criterion 7fb8926d… frozen before any run, judge Claude Opus, Claude Haiku (L1), CI +0.048…+0.094 · verdict: adopted (**LEVER (Haiku, dev 180)** (coordinator to review))

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Read chapter 9, Knowledge packs: https://r4topunk.github.io/boar-research/research/packs.md

## Facts cited {#facts}

Resolve every [F-…] marker in https://r4topunk.github.io/boar-research/data/facts.json. Each line gives the claim, the number with its metric family, set and status, judge, n, seeds, CI, date and caveat.

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- [F-1079] Large levers survive multiplicity correction. X2b z ≈ 5.5, LITE5-180 z ≈ 6, DEEPTHINK z ≈ 4.2 · set UNKNOWN (status UNKNOWN) · judge UNKNOWN · n UNKNOWN · seeds UNKNOWN · CI ≈ 60 judged comparisons · date 2026-10-16 · caveat: citation fix; ≈ 60 judged comparisons, Bonferroni over 100; the bigger risk is selection on the same dev sets
- [F-1087] X2b on the 1.7B (LITE5-180) +0.071; 1.7B+X2b − 4B plain −0.007 · set the 180 dev (dev, development data) · judge Haiku L1 · n 180 · seeds UNKNOWN · CI (+0.048…+0.094) / (−0.031…+0.018); n 180 · date 2026-10-16 00:56 · caveat: "= 4B" holds only on pack-matched dev; on the kit 1.7B −0.111 and X2b inert
- [F-1127] R79 X2b on lite 1.7B: 180 Haiku. +0.071 (+0.048…+0.094) · set UNKNOWN (status UNKNOWN) · judge UNKNOWN · n UNKNOWN · seeds UNKNOWN · CI not computed · caveat: why closed: LEVER (registered, not a null)

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Cite as: r4to, independent researcher. RatLab — A Boar Research (2026), research record 1.0, as of 2026-10-25. Text and data CC BY 4.0. Fact ids or a link must travel with a quote. How to cite: https://r4topunk.github.io/boar-research/cite/ · https://r4topunk.github.io/boar-research/CITATION.cff.

AI-reviewed, not clinically reviewed. Nothing here is medical advice.