Javier Ferrando

Researcher, Amazon

Joined

December 2021

Names

Javier Ferrando (Preferred)

Emails

****@gmail.com (Confirmed)

****@upc.edu (Confirmed)

Personal Links

Career & Education History

Researcher

Amazon (amazon.com)

2025 – Present

Researcher

Barcelona Supercomputing Center (bsc.es)

2025 – 2025

PhD student

Universidad Politécnica de Cataluna (upc.edu)

2020 – 2024

Advisors, Relations & Conflicts

PhD Advisor

Marta R. Costa-jussà

2020 – 2025

Expertise

interpretability

explainability

NLP

2021 – 2025

Publications

Language Models Can Explain Visual Features via Causal Interventions
Javier Ferrando, Enrique Lopez-Cuena, Pablo Agustin Martin-Torres, Daniel Hinjos, Anna Arias-Duart, Dario Garcia-Gasulla
- ICLR 2026 Conference Withdrawn Submission
- Readers: Everyone
Real-Time Detection of Hallucinated Entities in Long-Form Generation
Oscar Balcells Obeso, Andy Arditi, Javier Ferrando, Joshua Freeman, Cameron Holmes, Neel Nanda
- Submitted to ICLR 2026
- Readers: Everyone
Do I Know This Entity? Knowledge Awareness and Hallucinations in Language Models
Javier Ferrando, Oscar Balcells Obeso, Senthooran Rajamanoharan, Neel Nanda
- ICLR 2025 Oral
- Readers: Everyone
On the Similarity of Circuits across Languages: a Case Study on the Subject-verb Agreement Task
Javier Ferrando, Marta R. Costa-jussà
- ICML 2024 MI Workshop Poster
- Readers: Everyone
Information Flow Routes: Automatically Interpreting Language Models at Scale
Javier Ferrando, Elena Voita
- OpenReview Archive Direct Upload
- Readers: Everyone
A primer on the Inner Workings of Transformer-based Language Models
Javier Ferrando, Gabriele Sarti, Arianna Bisazza, Marta R. Costa-jussà
- OpenReview Archive Direct Upload
- Readers: Everyone
Toxicity in Multilingual Machine Translation at Scale
Marta R. Costa-jussà, Eric Michael Smith, Christophe Ropers, Daniel Edward Licht, Jean Maillard, Javier Ferrando, Carlos Escolano
- EMNLP 2023 Findings
- Readers: Everyone
Explaining How Transformers Use Context to Build Predictions
Javier Ferrando, Gerard I. Gállego, Ioannis Tsiamas, Marta R. Costa-jussà
- Published: 01 Jan 2023, Last Modified: 03 Oct 2023
- ACL (1) 2023
- Readers: Everyone
Toxicity in Multilingual Machine Translation at Scale
Marta R. Costa-jussà, Eric Smith, Christophe Ropers, Daniel Licht, Jean Maillard, Javier Ferrando, Carlos Escolano
- Published: 01 Jan 2023, Last Modified: 22 Jan 2024
- EMNLP (Findings) 2023
- Readers: Everyone
Neurons in Large Language Models: Dead, N-gram, Positional
Elena Voita, Javier Ferrando, Christoforos Nalmpantis
- Published: 01 Jan 2023, Last Modified: 22 Jan 2024
- CoRR 2023
- Readers: Everyone

View all 20 publications

Co-Authors

View all 41 co-authors