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Duplicate from unconst/Affine-5czsc2fc98-r637-r252-odpo-midrank-lobeta-softctx-ep3-lolr-merged
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---
base_model: unconst/Affine-5czsc2fc98-r252-merged
base_model_revision: b42d6245d77fe30885ea8a90387771e1bc465e0f
library_name: transformers
pipeline_tag: text-generation
tags:
- affine
- sn120
- reason-v3
- offline-dpo
- r637
---
# R637 — SoftCtx × MidRank × LoBeta MegaExtra ep3 × LoLR (offline DPO)
Affine SN120 challenger trained to beat the live king on **Reason v3**
(teacher-anchored score: `lpC(y_C|z_A) − lpC(y_C|∅)`).
## How this checkpoint was trained
- **Base / parent:** `unconst/Affine-5czsc2fc98-r252-merged@b42d6245d77fe30885ea8a90387771e1bc465e0f` (our crowned r252, reign 33)
- **Method:** offline DPO on Reason-ranked pairs (not SFT / not online GRPO)
- **What was optimized:** preference for higher teacher-side Reason on mined pairs
- **Data:** SoftCtx × MidRank × LoBeta pair set (soft context band, mid LoRA rank,
low DPO β). See `plan.md` / `dpo_duel_reason.jsonl` under `mining/experiments/r637-r252-offline-dpo-hialpha-midrank-lobeta-softctx-megaextrasteps-ep3-lolr`.
- **Key hyperparameters:**
- LoRA r=32 (MidRank), α=128 (HiAlpha)
- β=0.02 (LoBeta)
- lr=**1e-6** (LoLR)
- max_len=12288 (SoftCtx)
- max_steps=3600 MegaExtra; **epochs=3**
- **Hardware:** Lium `mine-r226-marsplan-fullft-1` (brave) GPUs 2,3 train+merge;
host-relay → n80 on `mine-r262-kevin-v5-nonking-grpo-1` (golden) GPUs 6,7
→ `/tmp/r637_merged`
- **Local n80 vs live king reign34** (`cryptoDev23/Affine-5Dku3dYp9j-hk8161@55b7ffe0…`):
- margin **+0.005735**, SE 0.001973, z=2.91, n=77
- bar `max(2·SE, δ=0.002)` = **0.003946** (~**1.45×**)
- thought median **168.5** (≥80), B pass **0.4125** (≥0.30)
- decision: Stage-5 licensed (`r637_decision_reign34.json`, p3643)
- **Lineage:** amplify of R580 Soft MidRank LoBeta Mega ep1 ~0.39× after R610
ep2 @5e-6 REFUTE; ≠ Soft MidRank MidBeta R635 ep3 LoLR REFUTE
- **Experiment path:** `mining/experiments/r637-r252-offline-dpo-hialpha-midrank-lobeta-softctx-megaextrasteps-ep3-lolr`
## Intended use
SN120 Affine miner submission / evalsrv Reason duel. Not a general chat model.
## License
Follows base model + Affine mining artifacts policy.