ledgernova/sn120-8ef1b06acfe8

TEXT GENERATIONPricing:Input $0.4 / Cached $0.07 / Output $4Concurrent Unit Cost:3Model Size:35.1BQuant:FP8Context Size:32kTool Calling:SupportedPublished:Aug 20, 2026License:apache-2.0Architecture:Transformer Open Weights Featherless Exclusive Cold

The ledgernova/sn120-8ef1b06acfe8 model is a 35.1 billion parameter Affine SN120 challenger, specifically optimized for Reason v4 evaluations. Trained using offline DPO on Reason-ranked duel pairs, it demonstrates a preference for thoughts that enhance teacher-side Reason. This model is designed for specialized mining submissions and evaluation server Reason v4 duels, rather than general chat applications.

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Overview

This model, ledgernova/sn120-8ef1b06acfe8, is an Affine SN120 challenger, a specialized 35.1 billion parameter model derived from the vera6/affine-5g4yy75zuz-t6 base. It was developed using offline DPO (Direct Preference Optimization), focusing on optimizing for Reason v4 evaluations.

Key Training Details

  • Methodology: Offline DPO on Reason-ranked duel pairs, not SFT or online GRPO.
  • Optimization Goal: To prefer thoughts that increase teacher-side Reason, using a tempered multi-sample log-mean-exp over teacher references.
  • Data: Filtered duel preference pairs from dpo_duel_reason.jsonl with SoftCtx filtering.
  • Key Hyperparameters: Notable settings include LoRA r=32 (MidRank), α=128 (HiAlpha), β=0.3 (HiBeta), a very low learning rate (lr=5e-7, UltraLoLR), and a max_len of 12288 (SoftCtx).
  • Performance: Achieved a win against the live king reign36 with a margin of +0.004951 and a z-score of 2.399 on n=80 evaluations for Reason v4.

Intended Use

This model is specifically designed for SN120 Affine miner submissions and evaluation server Reason v4 duels. It is not intended as a general chat model.