Text to speech API · Google

Gemini 3.8 Flash TTS API pricing per 1,000 characters

Turn text into speech with Google's Gemini 3.8 Flash TTS through the Cut.Pro API. You see the price before you generate and pay only for what you use.

  • Pay as you go, no subscription
  • 15 free credits on a new account
  • Free quote before every call
From$0.0811per 1,000 charactersR$0.27 · 5 credits10,000 characters: $0.81Updated November 07, 2026

Pricing

Gemini 3.8 Flash TTS pricing by mode and resolution

ModePrice per 1,000 charactersIn reaisCredits
Text only$0.0811R$0.275 credits

Updated November 07, 2026. Prices use the cheapest credit pack: 1 credit costs $0.0179 (R$0.0599).

Limits

What Gemini 3.8 Flash TTS accepts in each request

Modes
Text only
Billing
by the characters read

Code

How to call Gemini 3.8 Flash TTS free quote, generation and result

VOICE=$(curl -s "https://api.cut.pro/api/v1/models?endpoint=generations&kind=speech" \
  -H "X-Api-Key: $CUTPRO_API_KEY" | jq -r '.models[] | select(.id == "google/gemini-3.8-flash-tts") | .voices[0].id')

BODY=$(jq -cn --arg voice "$VOICE" '{"model":"google/gemini-3.8-flash-tts","prompt":"Hi! This audio was generated with the Cut.Pro API.","voice":$voice}')

CREDITS=$(curl -s -X POST https://api.cut.pro/api/v1/generations/quote \
  -H "X-Api-Key: $CUTPRO_API_KEY" \
  -H "Content-Type: application/json" \
  -d "$BODY" | jq .credits)

curl -X POST "https://api.cut.pro/api/v1/generations?wait=60" \
  -H "X-Api-Key: $CUTPRO_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d "$(jq -c --argjson credits "$CREDITS" '. + {credits: $credits}' <<< "$BODY")"
Read the docs

Questions

API questions before your first call

Each 1,000 characters cost $0.0811, so 10,000 characters come to $0.81 (R$2.71, 46 credits).
Create an account, make a key and send the request to the quote, which charges nothing. The 15 free credits cover 3,300 characters with Gemini 3.8 Flash TTS.
No. Buy a credit pack by card, or in reais with Pix from Brazil, and spend it on Gemini 3.8 Flash TTS and every other model with the same key.
No. The Cut.Pro key calls Gemini 3.8 Flash TTS without a Google account, with one balance for every model in the catalog.
Yes. With a CPF or CNPJ and full address in your billing details, the nota fiscal is issued after each payment is confirmed.

Still missing one? Help center

Generate with Gemini 3.8 Flash TTS today

Create a key, get a free quote and pay only for what you generate.

Create API key