The final lecture frames Open Questions in NLP 2026 as smart scaling: prolonged RL, Prismatic synthetic data, RL as pretraining, and open collaboration seek reasoning gains beyond adding parameters.
The final lecture is not a complete LLM-training tutorial. It studies data efficiency under fixed data and abundant compute, revisiting epochs, batches, ensembles, self-training, and conditions for synthetic continued pretraining.
Lecture 14 moves raw documents through language, quality, and safety filtering; exact and near deduplication; and source mixing. Each stage reshapes model behavior, while synthetic instruction and agent trajectories extend the pipeline into executable environments.