Earlier quoted context omitted.
Looking at the git repo ( https://github.com/ai-ng/swift ), it was made by some web developer, not Vercel. Likely OP (Vercel CEO) just made a mistake posting it as a "Show HN".
What i learned today is that elevenlabs has some serious competition from cartesia... like WOW
Thanks for the shoutout! We're very excited about how this space is evolving and are working on new features and perf improvements to support experiences like this.