Gemini 3.1 Flash TTS Preview API Pricing

Gemini 3.1 Flash TTS Preview pricing by provider

2 listings across 2 providers. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

Other Gemini 3.1 Flash TTS Preview prices on Google AI Studio

Gemini 3.1 Flash TTS Preview features

• Function calling
• Structured output
• Web search

Use Gemini 3.1 Flash TTS Preview with LiteLLM

Call Gemini 3.1 Flash TTS Preview through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/audio/speech. LiteLLM tracks the cost of every request at these prices.

from litellm import speech

response = speech(
    model="gemini/gemini-3.1-flash-tts-preview",
    input="Hello from LiteLLM",
    voice="alloy",
)

model_list:
  - model_name: gemini-3.1-flash-tts-preview
    litellm_params:
      model: gemini/gemini-3.1-flash-tts-preview
      api_key: os.environ/GEMINI_API_KEY

curl http://0.0.0.0:4000/v1/audio/speech \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "gemini-3.1-flash-tts-preview",
    "input": "Hello from LiteLLM",
    "voice": "alloy"
  }'

Gemini 3.1 Flash TTS Preview FAQ

More Google models

• Gemini 3.8 Flash Lite TTS$0.50 per 1M input tokens
• Gemini 3.8 Flash TTS$0.50 per 1M input tokens
• Gemini 3.8 Flash Cyber$1.50 / $7.50 per 1M tokens
• Gemini 3 Flash Preview Search$0.50 / $3 per 1M tokens
• Gemini 3.8 Live$0.75 / $4.50 per 1M tokens
• Gemini 3.8 Live Extended Thinking$0.75 / $4.50 per 1M tokens
• Gemini 3.8 Flash$0.75 / $3.75 per 1M tokens
• Gemini 3.5 Transcribe Live Preview$3.50 per 1M input tokens