Chirp 3 HD voices (Google Cloud Text-to-Speech): model ids and price

How to call it

Where to use Chirp 3 HD voices (Google Cloud Text-to-Speech), with its model id.

Providers, model ids, endpoints and docs for Chirp 3 HD voices (Google Cloud Text-to-Speech)
Provider	Model id	Endpoint	Docs
Google Cloud Text-to-Speech API	`<locale>-Chirp3-HD-<Voice> (e.g. en-US-Chirp3-HD-Charon)`	`https://texttospeech.googleapis.com (regions global, us, eu, asia-southeast1, europe-west2, asia-northeast1)`	docs.cloud.google.com

Pricing

Prices for Chirp 3 HD voices (Google Cloud Text-to-Speech)
Per 1M characters	$30

As published: “USD per 1M characters (first 1M chars/month free); Chirp 3 Instant custom voice $60 per 1M characters”.

Source: cloud.google.com, checked 29 September 2026.

Specs

Input: Text
Output: Audio
Context window: Not published
Max output: Not published
Open weights: No
Licence: Proprietary
Released: 2 April 2025
Status: Current
Type: Speech and audio

What stands out

What its maker marketed at launch, and what people found later, each with its source.

Streaming HD voices in 60+ locales

28 named voices, streaming and batch synthesis, pace (0.25-2x), pause and IPA/X-SAMPA pronunciation controls, SSML.

Source: docs.cloud.google.com
Instant custom voice

Found after launch

Chirp 3 Instant custom voice clones a voice from a short sample (30+ locales), priced at $60 per 1M characters.

Source: docs.cloud.google.com

Notes

GA 2025-04-02 (8 speakers, 31 locales), since expanded to 60+ locales. Google’s enterprise, non-LLM TTS line; the Gemini-TTS models (gemini-2.5-*-tts, Gemini 3.1 Flash TTS) are offered in the same Cloud TTS API. No 2026 successor (e.g. ‘Chirp 4’) found.

Sources: Chirp 3 HD docs, Cloud TTS release notes, pricing.