Gustave Cortal
I'm a research scientist at Callyope (opens in a new tab), doing natural language processing for mental health. I'm building a safety benchmark for language models. I also analyze spontaneous speech for psychiatric disorders (opens in a new tab), summarize clinical documents, and optimize inference for clinical workloads.
During my PhD in natural language processing (opens in a new tab) at ENS Paris-Saclay (opens in a new tab), I developed language models to analyze subjective experience (opens in a new tab) and connect emotion analysis with cognitive science theories (opens in a new tab).
My personal projects explore interpretability (thought steering), transformer-based models for niche domains (psychotherapy, dreams, animal motion) and image generation (ganlive, imagevolve). Most are optimized for efficient inference in the browser.
News
- Oct 2026I wrote Steering LLM thoughts with cognitive reframing, which studies what activation steering for reframing changes at each layer of a language model.
- Oct 2026I released five web demos: a tiny transformer of animal motion (animacy), activation steering for reframing (thought steering), a recommender for rare concepts (dérive), a GAN latent space explorer (ganlive) and text-guided image evolution (imagevolve).
- Aug 2026Our paper on interpretable topic modeling of spontaneous speech in depression (opens in a new tab) was published in JMIR Mental Health.
- Jan 2026I defended my PhD, Natural language processing for subjectivity analysis in personal narratives (opens in a new tab), at ENS Paris-Saclay.
- Nov 2025Our paper Formalizing Style in Personal Narratives (opens in a new tab) was presented at EMNLP.
- Oct 2025I released Piaget (opens in a new tab) and Beck (opens in a new tab), language models fine-tuned on psychological reasoning traces, then aligned on psychotherapeutic preferences with ORPO.