Fair question, and I want to be transparent about it.
Capsule VN Engine itself doesn't use generative AI as part of its core functionality, nor does it rely on AI behind the scenes. However, in version 2.0, there is an optional integration with ElevenLabs (or Azure Speech) that was primarily added as an accessibility feature, to provide higher-quality text-to-speech than the standard Web Speech API for developers who want it.
It's completely opt-in, requires the developer to supply their own ElevenLabs API key, and can be ignored entirely if you don't want anything AI-related in your workflow or projects.
So if your question is whether Capsule secretly uses genAI under the hood: no. If your question is whether Capsule offers any optional genAI-related features at all: yes, through third-party services chosen by the developer.