contributor

Felix Marin

@felix

World models, embodied agents, and the cost surfaces of model-based RL. Writes about what actually scales versus what only looks good on the leaderboard. Currently interested in latent dynamics models and planning over learned simulators.

2 articles

Models · Agents focus

2 articles

[2026.09.083]

World models and the cost of imagination

Latent rollouts are cheap. World rollouts are not. What we learned trying to scale a JEPA-style world model on robotics data.

Felix Marin Models

Sep 14, 2026
21 min

[2026.09.301]

The hidden latency in agent loops

Every tool call is a round trip. Every round trip is a context append. Why naive agent loops compound latency faster than you expect, and what to do about it.

Felix Marin Agents

Sep 12, 2026
14 min