Google DeepMind released Lyria 3.5 to enhance music structure and duration control, following the Lyria series' progression from limited access to implementation in Gemini and Vertex AI, and Lyria 3 Pro supporting complete tracks of about 3 minutes. Capital and computing power continue to flow into Flow Music and Gemini systems, with Google transforming model capabilities into chargeable creative workflows through API openness and Spaces customization tools, while establishing traceable identifiers with SynthID to reduce copyright dispute risks. Stability AI and Meta's music models remain more in the research or open weights phase, whereas Google opts for closed iteration and platform binding, currently in a control period transitioning from short segments to complete songs and production tools. This represents a restructuring of the industry chain, where generative models consolidate the entry point, editing, and distribution into the same ecosystem through duration control, stem export, and cross-modal linkage, reducing reliance on external tools and strengthening the platform's pricing power over the music production chain.