@inproceedings{ontalvilla-etal-2026-multimodal, title = "Multimodal {LLM}s Do Not Compose Skills Optimally across Modalities", author = "Ontalvilla, Paula and Ormazabal, Aitor and Azkune, Gorka", editor = "Piperidis, Stelios and Bel, N{\'u}ria and van den Heuvel, Henk and Ide, Nancy and Krek, Simon and Toral, Antonio", booktitle = "Proceedings of the Fifteenth Language Resources and Evaluation Conference", month = may, year = "2026", address = "Palma de Mallorca, Spain", publisher = "ELRA Language Resource Association", url = "https://aclanthology.org/2026.lrec-1.767/", doi = "10.63317/32osokhu3sac", pages = "9767--9789" }