YK Sugi, developer experience manager at Eventual and the creator of CS Dojo, on reliable AI at AI By the Bay 2025. Speaking about AI in Germany for the first time; reliability as a system that is never down, where the whole ecosystem and not just the model holds up; open-source models getting better and the engineering basics of serving, backups, and well-tested front ends; and a five-year guess of more multimodal, video-in and video-out, and less hallucination.