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Call for Participation: CRAC 2026 Shared Task on Multilingual Coreference Resolution
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https://ufal.mff.cuni.cz/corefud/crac26
We are excited to announce the fifth edition of the Shared Task on Multilingual Coreference Resolution! As in the previous edition, where LLMs were not able to dethrone traditional approaches, the upcoming task again primarily focuses on LLMs and challenges their ability to predict coreference across a range of typologically diverse languages.
The results will be presented at the CODI-CRAC 2026 workshop, co-located with the ACL 2026 conference in San Diego, USA. System description papers will be published in the proceedings of CODI-CRAC, also available in the ACL anthology.
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Task description
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The task is to identify mentions and cluster them according to their reference to the same entity. Participants may choose between two tracks:
(1) LLM track
(2) Unconstrained track
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Data
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The Shared Task is based on the upcoming CorefUD 1.4. collection, which comprises datasets with coreference annotation for at least 17 languages. Participants may also choose to compete on only a subset of these languages.
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Timeline (tentative)
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January 16, 2026 – start of the development phase
– release of training and development data
– evaluation tool available on GitHub
– baseline system available at GitHub
– development evaluation possible via CodaBench
March 4, 2026 – start of the evaluation phase
– test evaluation via CodaBench
March 18, 2026 (AoE) – end of the evaluation phase
April 10, 2026 – submission of system description papers to the CODI-CRAC 2026 workshop
July 3/4, 2026 – the CODI-CRAC workshop at ACL
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Participation
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Please let us know by filling in the registration form:
https://ufal.mff.cuni.cz/corefud/crac26#llm-registration
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Organizers
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Michal Novák, Charles University, Czechia
Martin Popel, Charles University, Czechia
Zdeněk Žabokrtský, Charles University, Czechia
Dan Zeman, Charles University, Czechia
Anna Nedoluzhko, Charles University, Czechia
Milan Straka, Charles University, Czechia
Ondřej Pražák, University of West Bohemia, Czechia
Miloslav Konopík, University of West Bohemia, Czechia
Jakub Sido, University of West Bohemia, Czechia