Generative engine

Change history

22 Oct 2026

Amazon Polly's Generative TTS engine gets a major accuracy and voice upgrade

Parameter	Before	Now
Voice catalog	43 generative voices	57 generative voices across 11 languages and 25 locales
New voices	Not specified	14 new voices across 9 locales
New languages	Not available in Generative engine	Hindi and Finnish generally available
API	SynthesizeSpeech API, same voice names	Unchanged; drop-in upgrade, no code changes required
Pricing	Standard pay-as-you-go pricing	Same price, no cost increase, no new SKU
Region availability	10 AWS Regions	11 AWS Regions including GovCloud (US-West)
Accuracy	Baseline generative voice accuracy	Improved accurate rendering of numbers, currency, addresses, dates
Streaming	Not specified	Bi-Di Streaming API (StartSpeechSynthesisStream) supported for real-time voice agents

News

Voice AI· Important· 🧪 Worth Testing

Amazon Polly's Generative TTS engine gets a major accuracy and voice upgrade

AWS has upgraded the Amazon Polly Generative engine with more natural, expressive speech and better accuracy for numbers, addresses and confirmation codes. The update adds 14 new voices across 9 locales, bringing the total to 57 generative voices in 11 languages and 25 locales, including first-time general availability for Hindi and Finnish. It is a drop-in upgrade: voice names, APIs and pricing stay the same, so existing applications work unchanged.

3 hours agoAWS Machine Learning