Get the AppBuild with API

Soniox vs Google TTS pricing

Compare Google Gemini TTS and Soniox text-to-speech pricing by minute, hour, and month. See estimated API costs for voice agents, conversational AI, AI assistants, and other voice applications.

Pricing calculator

Compare Soniox and Gemini TTS cost

Compare estimated TTS costs at different monthly speech volumes. Adjust the usage level to see how Soniox and Google Gemini TTS costs scale from smaller applications to high-volume voice workloads.

1,000 hours of speech / month

1025501002505001k2.5k5k10k100k

Pricing assumptions

Based on public pay-as-you-go pricing. Enterprise discounts and committed-use contracts may differ. Some providers charge separately for certain features. The calculator uses the public price for the provider configuration that most closely matches Soniox.

How much does Google TTS cost?

Google Gemini 3.8 Flash TTS is priced based on input text tokens and generated audio tokens rather than directly by character or minute.

Google Gemini 3.8 Flash TTS costs $1.64/hour at the standard rate, compared with $0.70/hour for Soniox. Google charges by text and audio tokens rather than speech duration, while this comparison normalizes the pricing to estimated speech time.

Soniox

tts-rt-v2, updated June 2026

$0.70/hr

$0.0117 per minute

Google

gemini-3.8-flash-tts, updated August 2026

$1.64/hr

$0.0273 per minute

Google currently offers Gemini 3.8 Flash TTS at a discounted Preview rate of $0.50 per 1 million text tokens and $9.00 per 1 million audio tokens through December 31, 2026. This comparison uses the standard rate rather than the temporary Preview discount.

Because most of the cost comes from generated audio tokens, the effective Google TTS cost increases with the amount of speech generated.

Gemini TTS cost per character, minute, and month

Google does not directly bill Gemini 3.8 Flash TTS by character. For an easier comparison with Soniox, this page uses approximately 50,000 characters as one hour of generated speech.

At the standard rates used above, Gemini 3.8 Flash TTS works out to approximately $0.0273 per minute, compared with $0.0117 per minute for Soniox TTS.

Sonioxtts-rt-v2Googlegemini-3.8-flash-tts
Cost per minute$0.0117$0.0273
Estimated cost per 1,000 characters$0.014$0.0328
Cost per hour$0.70$1.64
Cost per month at 1,000 hours$700$1,640

For API users, Google Gemini TTS cost depends on total input and generated audio usage rather than a fixed monthly subscription. At 1,000 hours of generated speech per month, the estimated cost is approximately $1,640 with Google, compared with $700 with Soniox.

Monthly TTS cost at 1,000 hours of generated speech

Soniox

tts-rt-v2

$700

Google

gemini-3.8-flash-tts

$1,640
Difference$940/month

Comparing Google TTS and Soniox by minute, hour, and estimated monthly usage gives a clearer view of the cost of powering voice agents, conversational AI, AI assistants, voice applications, and other speech products.

Soniox vs Google TTS

Compare Soniox tts-rt-v2 and Google Gemini TTS across the capabilities that matter when building production voice applications, including streaming, multilingual voices, voice cloning, timestamps, pronunciation control, and expressive speech.

Sonioxtts-rt-v2Googlegemini-3.8-flash-tts
Streaming audio output
Streaming text input
Multilingual voice
Voice cloning
Timestamps
Character level timestamps
Pronunciation control
Expressive control
SupportedPartialNot supported

At 1,000 hours of generated speech per month, the pricing used in this comparison represents an estimated $940 monthly difference between Soniox and Google Gemini TTS.

Gemini TTS pricing FAQ

How much does Google TTS cost?
Google TTS pricing depends on the Google speech product and model you use. For Gemini 3.8 Flash TTS, this comparison uses a standard rate of $1.00 per 1 million text input tokens and $18.00 per 1 million generated audio tokens.
Using the assumptions on this page, that works out to approximately $1.64 per hour of generated speech, compared with $0.70 per hour for Soniox tts-rt-v2.
What is Google Cloud TTS pricing?
Google Cloud Text-to-Speech and Gemini TTS use different pricing models and should not be treated as the same product.
Google Cloud TTS pricing varies by model, including Standard, WaveNet, Neural2, and Chirp 3: HD voices. Gemini TTS uses token-based pricing. When comparing costs, make sure you are comparing the same Google product and model.
What is the Google TTS price per minute?
Google does not directly charge Gemini 3.8 Flash TTS by minute. Using the pricing and speech-duration assumptions in this comparison, Gemini 3.8 Flash TTS costs approximately $0.0273 per minute at the standard rate.
Soniox tts-rt-v2 is approximately $0.0117 per minute.
What is the Google TTS cost per character?
Google Gemini 3.8 Flash TTS is not priced directly per character. It is billed based on input text tokens and generated audio tokens.
For comparison purposes, this page estimates a per-character equivalent using approximately 50,000 characters per hour of speech. Under that assumption, Gemini 3.8 Flash TTS costs approximately $0.0328 per 1,000 characters, compared with $0.014 for Soniox.
What is the Google Cloud TTS cost per month?
Google Cloud TTS does not have one fixed monthly price. Your monthly cost depends on the model you use and the amount of text or audio you process.
For Gemini 3.8 Flash TTS, the estimated cost at 1,000 hours of generated speech is approximately $1,640 per month at the standard rate used in this comparison.
What is the Google TTS API pricing?
Gemini TTS API usage is token-based. The cost depends on the amount of text submitted and audio generated.
For the Gemini 3.8 Flash TTS model used in this comparison, the standard rates are $1.00 per 1 million text input tokens and $18.00 per 1 million generated audio tokens.
What is the Google TTS API price per hour?
Using the assumptions in this comparison, Google Gemini 3.8 Flash TTS costs approximately $1.64 per hour of generated speech at the standard rate.
Soniox tts-rt-v2 costs approximately $0.70 per hour.
How does Google TTS pricing compare with Soniox?
At the standard Google rates used in this comparison, Gemini 3.8 Flash TTS costs approximately $1.64 per hour, compared with $0.70 per hour for Soniox tts-rt-v2.
At 1,000 hours of generated speech per month, that is approximately $1,640 for Google versus $700 for Soniox, a difference of about $940 per month.
What is Google Gemini TTS pricing?
Gemini TTS uses token-based pricing rather than a simple per-character or per-minute rate.
For Gemini 3.8 Flash TTS, this comparison uses $1.00 per 1 million text input tokens and $18.00 per 1 million generated audio tokens at the standard rate.
Is Gemini 3.8 Flash TTS discounted?
Google currently offers a discounted Preview rate for Gemini 3.8 Flash TTS. The discounted rate is $0.50 per 1 million text input tokens and $9.00 per 1 million generated audio tokens through December 31, 2026.
The main comparison uses Google’s standard rate so that the pricing comparison does not depend on a temporary promotional price.
What is Google Cloud TTS API pricing for Chirp 3: HD, Neural2, WaveNet, and Standard voices?
Google Cloud Text-to-Speech offers multiple voice models with different pricing structures. Chirp 3: HD, Neural2, WaveNet, and Standard voices should be evaluated separately because their rates and capabilities differ.
This page focuses on Gemini 3.8 Flash TTS rather than combining different Google TTS products into a single price comparison.
Does Google TTS have a free tier?
The availability of free usage depends on the specific Google TTS product, model, and current Google Cloud or Gemini offering.
For production cost comparisons, it is better to use the applicable paid API rate and your expected usage rather than relying on free usage allowances.
Does Google TTS support expressive speech?
Gemini TTS is designed for expressive speech generation and can generate speech with different speaking styles and delivery characteristics.
For production applications, compare the specific voice, language, streaming, control, and output capabilities you need against the corresponding Soniox model.

Ready to get started?

Create an account instantly, or contact us to design a custom package for your business.

Build with API

Documentation

Get up and running in minutes and spend your time building, not wrestling with the API.

Explore docs

See what you’ll pay

Pay only for what you use with our flexible pricing. Built to scale with you.

Pricing details