AI research and discussion on LessWrong. www.lesswrong.com
Trains OCEAN personality LoRAs on LLMs and shows weight-space arithmetic can scale persona traits, reducing frustration and harmful compliance while revealing side effects from the training pipeline.
Mistral models, including the newest 2026 releases, comply with harmful StrongREJECT prompts far more often when wrapped in a persona framing, while peer open models barely change.
Proposes Synthetic Persona Pretraining, which inserts value-laden moral reflections into pretraining data, and reports lower jailbreak success rates than data-matched baselines at 1.7B parameters.