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Author

Daniil Gavrilov

Tinkoff Research

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ESSA: Evolutionary Strategies for Scalable Alignment

ESSA (Evolutionary Strategies for Scalable Alignment), a gradient-free online alignment stage that follows supervised fine-tuning (SFT) and replaces the gradient loop with inference-only black-box search, is presented.

Daria Korotyshova, B. Shaposhnikov, A. Malakhov et al. · 3 citations

F-GRPO: Don't Let Your Policy Learn the Obvious and Forget the Rare

A difficulty-aware scaling coefficient is proposed, inspired by Focal loss, that down-weights updates on high-success sampled groups and improves average math pass@256 in all three cases, without increasing group size or computational cost.

Daniil Plyusov, Alexey Gorbatovski, B. Shaposhnikov et al. · 9 citations · ⚡1
#machine learning Preprint May 2025

Kronecker Factorization Improves Efficiency and Interpretability of Sparse Autoencoders

KronSAE is proposed, a design that factorizes the latent space into heads and forms post-latent features as pairwise compositions of lower-dimensional pre-latents using mAND, a differentiable AND-like interaction that imposes a compositional co-activation prior while remaining compatible with standard SAE objectives an...

Vadim Kurochkin, Yaroslav Aksenov, Daniil Laptev et al. · 1 citation

You Do Not Fully Utilize Transformer's Representation Capacity

Layer-Integrated Memory (LIMe) is introduced, a lightweight extension that leverages existing key-value buffers and learns per-head, per-layer routing weights to integrate representations from previous layers to improve perplexity per FLOP and yield strong gains on synthetic tasks while preserving higher value-vector e...

Gleb Gerasimov, Yaroslav Aksenov, Nikita Balagansky et al. · 4 citations
#machine learning Preprint Aug 2026

A Model with No Head and Many Thoughts

This work introduces Soft Latent Thinking, a method that replaces the LM head during reasoning with a lightweight projector, enabling autoregressive rollout in embedding space where reasoning steps remain continuous rather than tokenized.

N. Koriagin, Yaroslav Aksenov, George Bredis et al. · 0 citations
#machine learning Preprint Jul 2026

Qantara: Bridge-Flow Training for Multi-Paradigm JEPA Control

Qantara is presented, an end-to-end JEPA whose joint training objective pairs a Brownian-bridge interpolant between consecutive clean latents on the state axis with noise-to-data flow matching on the action axis, and these results move JEPA world models from single-paradigm planners to multi-paradigm controllers.

Ruslan Rakhimov, George Bredis, Yuriy Maksyuta et al. · 2 citations

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