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Johannes Hagemann

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Preprint Aug 2026

Prefix Sliding for efficient test-time scaling

Prefix Sliding is proposed, which discards tokens during reasoning that are not part of the prefix or the window of the last few thousand tokens, allowing for efficient long-horizon test-time scaling.

Niklas Muennighoff, Zhengyuan Wang, Zeya Chen et al. · 1 citation · ⚡1
Preprint Aug 2026

Prime Agent: A Self-Improving RLM Harness

Low-friction, expressive membrane prevents harness failures from becoming model failures and pushes measurement toward the model's true maximal underlying capability, on Factorio, where refinement allows for continuous technology progression and dedicated subagents enable parallelized work.

Seth Karten, Alex L. Zhang, Kevin Thomas et al. · 16 citations · ⚡2

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