The startup says its downloadable, 31 million-parameter model can generate speech on most devices without an internet connection.
Amazon adds text-message shopping to Alexa
The feature is initially available by invitation to a limited group of U.S. customers, with a wider launch planned in the coming weeks.

Amazon said on November 6 that it was introducing a text-message option for Alexa for Shopping, allowing U.S. customers to find products and buy them using its AI shopping assistant. Access is initially limited to invited users, the company said.
Customers can use the feature to compare and research items, monitor deals and price reductions, and ask the assistant to place orders for them, according to Amazon. The company said it plans to expand availability in the coming weeks.
The rollout comes after Amazon recently barred Muse, Meta's AI shopping agent, from its marketplace. Amazon said the tool appeared to enter its online store without permission and retain customers' credentials.
Amazon also obtained a March court order that barred Comet, Perplexity's shopping agent. A U.S. appeals court reversed that ban in August, but the legal proceedings remain unresolved.
