# Overview of BioASQ 2025: The Thirteenth BioASQ Challenge on Large-Scale Biomedical Semantic Indexing and Question Answering

## TL;DR

The 13th BioASQ challenge in 2025 showcased significant progress in biomedical semantic indexing and question answering, introducing new tasks and attracting over 80 teams with 1000+ submissions.

## Contribution

This edition introduced four new tasks in biomedical NLP, expanding the scope of BioASQ and demonstrating ongoing advancements in the field.

## Key findings

- Multiple systems achieved competitive performance
- Introduction of new multilingual and specialized tasks
- High participation indicating active research community

## Abstract

This is an overview of the thirteenth edition of the BioASQ challenge in the context of the Conference and Labs of the Evaluation Forum (CLEF) 2025. BioASQ is a series of international challenges promoting advances in large-scale biomedical semantic indexing and question answering. This year, BioASQ consisted of new editions of the two established tasks, b and Synergy, and four new tasks: a) Task MultiClinSum on multilingual clinical summarization. b) Task BioNNE-L on nested named entity linking in Russian and English. c) Task ELCardioCC on clinical coding in cardiology. d) Task GutBrainIE on gut-brain interplay information extraction. In this edition of BioASQ, 83 competing teams participated with more than 1000 distinct submissions in total for the six different shared tasks of the challenge. Similar to previous editions, several participating systems achieved competitive performance, indicating the continuous advancement of the state-of-the-art in the field.