Amazon Polly delivers a major upgrade to its Generative engine

Amazon Polly Generative engine now offers more natural and accurate speech output. We’re introducing an upgrade to the Amazon Polly Generative engine that delivers more expressive, more accurate speech output with low latency. The upgrade adds 14 new voices across 9 locales, including general availability of Generative voices in Hindi and Finnish for the first time. The upgrade is now generally available in production.

Importantly, this is a drop-in upgrade for existing generative voices. Voice names and API calls are unchanged, so your existing applications continue to work as they do today.

Amazon Polly is a fully managed AWS service that converts text into natural-sounding speech for contact centers, large language model (LLM)-based agentic applications, media and entertainment, e-learning, accessibility, and other applications that require reliable voice output at scale.

The Amazon Polly Generative engine now delivers more natural, expressive speech alongside low-latency streaming for real-time applications, Speech Synthesis Markup Language (SSML) support for fine-grained control, and the operational reliability of a fully managed AWS service. This combination of quality, performance, and cost efficiency supports a wide range of production use cases.

The Amazon Polly Generative engine offers competitive pricing on a pay-as-you-go basis. With this model upgrade, you get improved voice quality and accuracy at the same price. There’s no cost increase, no new SKU, and no changes to your existing integration. You can cache and replay synthesized static prompts with no additional cost. Refer to Amazon Polly pricing for complete cost information.

The next-generation Generative engine of Amazon Polly is available today, delivering more natural and more accurate voices, adding 14 new voices, including generative voices generally available in Hindi and Finnish for the first time, and requires no change to your code. See Amazon Polly pricing page for pricing information. To get started, open the Amazon Polly console to try the voices, and see the Amazon Polly documentation to build with them.

The upgraded Amazon Polly Generative engine uses a standard Amazon Polly API call to build your speech applications. With Amazon Polly, you can continue to build with familiar AWS patterns: call the same Amazon Polly API, manage access with AWS Identity and Access Management (IAM), use the output in your existing applications and contact-center flows, and monitor the workloads that synthesize speech for your customers.

This launch is designed to elevate the speech output quality that you can hear with your existing Amazon Polly implementation. No changes to your code are required to get the upgraded voices. For applications that already use Amazon Polly Generative voices, the upgrade happens in place. For new applications, the same SynthesizeSpeech API gives you access to a larger set of generative voice catalogs. With the Bi-Di Streaming API StartSpeechSynthesisStream , you can stream text to Amazon Polly and receive synthesized audio back simultaneously. This is well-suited for real-time applications like voice agents and bespoke characters in games.

Contact centers. Accuracy matters most in customer service conversations. When a caller checks an order, a voice that reads back the tracking number, address, and confirmation code correctly helps resolve the call in self-service rather than escalating to a human agent. Amazon Polly Generative voice’s accurate entity pronunciation and low-latency generation make automated interactive voice response (IVR) interactions sound more conversational.