The 23rd International Conference on the Integration of Constraint Programming, Artificial Intelligence, and Operations Research will be held for the first time on the African continent, namely in Rabat, Morocco. It will take place from 26 to 29 May, 2026.
The aim of the conference is to promote a space where researchers from Constraint Programming (CP), Artificial Intelligence (AI), and Operations Research (OR) present innovative techniques, new applications, and original cutting-edge ideas, thereby encouraging researchers from one area to learn from the others. Of particular interest to the conference are papers that integrate concepts and methodologies from these different fields, either proposing interesting new techniques for complex/practical problems or expanding our theoretical insights and cross-field understanding. However, high-quality original papers from a single area are welcome when also relevant to the other communities involved. The conference also strongly encourages submissions showcasing CP/AI/OR techniques on challenging real-world applications.
The program committee invites submissions that include, but are far from limited to, the following topics:
New methodologies in the interface between machine learning and optimisation, such as neurally-guided solving techniques, prediction + optimisation techniques, CP/OR techniques to address AI and machine learning tasks, large language models for modeling and solving and more.
Novel relaxation and inference methods based on constraint propagation, polyhedral techniques/cutting planes, convex/second-order conic optimization, graph-based algorithms, dynamic programming, and decision diagrams for optimization.
New search perspectives involving enumeration/branch-and-bound strategies, innovative decomposition techniques (e.g., based on column generation/Benders), intelligent backtracking, incomplete search, and learning-based heuristics.
Advanced integrated methods that expose new model transformations, communication strategies across MIP/CP/PB/SAT solvers, distributed solution techniques, and portfolio solvers.
Innovative models and applications of CP/AI/OR techniques.
Implementation or evaluation of CP/AI/OR techniques and optimization systems.
Submissions are of two types: regular papers (submitted for publication and presentation) and extended abstracts (submitted for presentation only).
The conference will recognize a distinguished paper award and a student paper award.
Regular papers present original unpublished work and can be of two types:
long papers (at most 15 pages plus references)
short papers (at most 8 pages plus references)
Both long and short papers will undergo rigorous review and are subject to the same criteria of quality. Both types are also eligible for the distinguished paper or student paper award. Short papers are particularly encouraged for interesting and novel work in progress, for which the practical or theoretical relevance is not yet fully identified.
Submissions to CPAIOR are single blind. In a single blind review process, the author names are not hidden for the reviewers, but the reviewer names are hidden for the authors.
The conference proceedings will be published in the Springer Lecture Notes in Computer Science series. All regular papers should be prepared in the format used for that series (LNCS instructions).
Abstracts: December 1, 2025 (AoE: anywhere on Earth)
Full papers: December 7, 2025 (AoE)
Rebuttal phase: January 20 - 23 Jan, 2026
Notification: February 9, 2026
Camera ready: TBA
Regular papers submitted to CPAIOR must not be under review at a different venue at the same time during the reviewing period. A regular paper abstract can be submitted if the paper is still under review elsewhere, but the paper will have to be withdrawn by the full paper submission deadline from CPAIOR or the other venue.
Authors are entirely responsible for the content they submit. Use of GenAI for language editing is allowed. Extensive use of GenAI is discouraged due to the danger of wrong citations, wrong explanations or insufficient depth and contextualisation.
Extended abstracts should be one or two pages in length and may present preliminary work or work already published in other outlets. The extended abstracts are submitted for presentation only (if accepted), and will not be formally published in the LNCS conference volume. A collection of the accepted extended abstracts will be published on the conference website. A submission representing work submitted or published in another outlet should state that outlet. Extended abstracts will be reviewed to ensure appropriateness for the conference.
Extended abstracts: 6 March 2026
Notification: 23 March 2026
We will use OpenReview.net to manage the reviewing process. Please use the following link to submit your papers:
https://openreview.net/group?id=cpaior.org/CPAIOR/2026/Conference
Reviewing will follow the same process as in previous years: the process is single-blind, and all submissions, reviews, rebuttals and comments will stay private throughout the entire review period as well as afterwards. The OpenReview.net platform can support a much more open, community-engaged process, however we have decided not to use those features for now. We aim to start a discussion within the community about any potential changes for future conferences.
For any queries on the submission process, please contact the Program Chair, Tias.Guns at kuleuven.be.