General Intuition raised $220M co-led by Valor Equity Partners and Atreides Management at a $6.2B valuation. The signal: as text and static web data run dry, the vast store of 'how humans react to unexpected situations' buried in gameplay footage is being repriced as a scarce fuel for training agents that act in the physical world.
Audio representation, temporal relationships in video, and action-conditioned world transitions are different learning tasks. The earlier combined guide checked only audio at the end. This URL now serves as a reading map to one full guide each for Lectures 24–26; the Lecture 26 guide also covers the separate alignment deck.
Model-based RL first learns a dynamics model that predicts s_{t+1}, then uses it in one of two ways: to generate extra training data (Dyna, MBPO) or to think a few steps ahead before acting (planning). The thread running through Lecture 11 of CS224R is how to avoid being dragged down by model error. Start synthetic rollouts from real states and keep them short, average errors out with an ensemble of models, and attach a value function to the tail of long-horizon plans. Whether a model is worth learning depends on whether it is easier or harder to learn than the policy.
The last two lectures of CS231N Spring 2026 have no public slides. The schedule lists L17 only as "World Modeling" with guest lecturer Gordon Wetzstein, and L18 only as "Human-Centered AI." Outside readers get 2025 substitutes: that year's L17 was a different topic, Robot Learning (Yunzhu Li, slides and video), and L18 is a Fei-Fei Li recording with no slides. This post labels each year separately and never presents 2025 content as 2026. The second half covers the final project: 35% of the grade, two tracks (Applications and Models), pixels required, and deliverables of a one-paragraph proposal, three milestone check-ins, a 6–8 page report and a poster.
The last guest deck in CS234 Winter 2026, by Shane Gu of Google DeepMind: 36 slides, no public recording. It has three threads. First, Solomonoff induction says the best predictor is the shortest program that generates the data, and prediction comes in three levels. Second, a forward model F and two inverse models, Π and Q, share one notation, which shows how shooting and direct collocation each plan with a different kind of model and why TDMs and Generalized Decision Transformers are world models at a different time scale. Third, the deck asks whether video models can become the foundation model for the physical world.
The two strongest signals at AI conferences in 2025 were reasoning papers jumping from 47 to 216, a 4.6-fold rise, and agent-related terms exceeding 150 papers with 4.3–11-fold growth. Diffusion moved from breakout topic to infrastructure; RAG became a mainstream enterprise architecture with unusual coverage across all five conferences; state-space models and world models began tracing the early 2020–2021 path of Vision Transformers. Pure prompt-engineering papers encountered reviewer fatigue.