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David Kaczér

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Last Translation Benchmark

The Last Translation Benchmark is introduced, a collection of human-authored and peer-reviewed examples that break leading machine translation models and a new evaluation approach: each example comes with handcrafted verification rules describing concrete failure cases on that example, therefore allowing reliable and a...

Vilém Zouhar, Niyati Bafna, Mukund Choudhary et al. · 0 citations
#natural language process... Preprint May 2026

Reinforcement Learning Can Amplify Emergent Misalignment from Harmless Rewards

It is shown that rewarding narrow, overtly misaligned behavior produces substantially higher general-domain misalignment than sample-matched SFT, and that EM from RL can be induced by reward signals that could plausibly arise naturally, such as unpopular aesthetic preferences or poor rhetorical appeals.

Magnus Jørgenvåg, David Kaczér, Lasse Ruttert et al. · 2 citations
Open access Jul 2026

All too perfect: bias and aspiration in persona generation with LLMs

It is proposed that persona-based evaluation can serve as a scalable diagnostic of what generative systems value and prioritize when depicting humanity, and that persona generations are far from neutral.

N. Corrêa, Rafaela Weber Mallmann, David Kaczér et al. · 0 citations

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