My biennial update to the "Hello World"s of ML & AI:
2013: RandomForestClassifier on Iris
2015: XGBoost on Titanic
2017: MLPs on MNIST
2019: AlexNet on CIFAR-10
2021: DistilBERT on IMDb movie reviews
2023: Llama 2 with LoRA on Alpaca 50k
2025: Qwen3 with RLVR on MATH-500