Stoyan Ivanov wins the 2026 Balkan AI & Machine Learning Olympiad

The 2026 regional final closed with Stoyan Ivanov from Bulgaria taking first place overall. His submission combined a strong model, reproducible Python code, careful validation, and a clear explanation of deployment limits.

The jury reviewed all medal candidates after the explanation round to make sure the leaderboard reflected more than raw model accuracy. Code quality, data work, reasoning, and responsible AI analysis all affected the final result.

Ivanov's notebook documented each cleaning step, compared several baseline models, and explained why the final model was appropriate for the dataset. The review panel noted that his error analysis was practical and easy to audit.

The submission also identified where the model should not be used, including sensor gaps, city-level differences, and possible bias in historical data coverage.

Special awards recognized responsible AI analysis, beginner performance, machine learning implementation, and real-world impact. This keeps the olympiad focused on complete AI problem solving instead of rewarding a single leaderboard metric.