Gemini 3.1 Flash TTS Preview API Pricing
Short answer
Gemini 3.1 Flash TTS Preview costs $1/M text + $20/M audio tokens. Last verified 2026-06-21 from cloud.google.com. Confidence: Verified.
Gemini 3.1 Flash TTS Preview is Google's latest low-latency, steerable speech generation model with expressive audio tags.
TTS pricing
$20.00 /1M audio tokens
Price detail$1/M text + $20/M audio tokens
Capabilities
Speech / billing specSingle/multi-speaker; 25 audio tokens/sec
Modalitytext → speech
ChannelVertex AI
ProviderGoogle
Best for
TTSMulti-speakerControllable
Preview model. Audio output is billed at 25 tokens per second, making the standard output rate about $0.03 per audio minute. Batch is 50% cheaper.
Last checked Verified
More from Google
Gemini 3.1 Pro
$2.00/1M in
$12.00/1M out
Reasoning, Agentic, Long context
Gemini 3.5 Flash
$1.50/1M in
$9.00/1M out
Coding, Agentic, Fast
Gemini 3.1 Flash-Lite
$0.25/1M in
$1.50/1M out
Low cost, High volume, Fast
Gemini 2.5 Pro
$1.25/1M in
$10.00/1M out
Reasoning, Long context, Multimodal
Gemini 2.5 Flash
$0.30/1M in
$2.50/1M out
Low latency, High volume, Multimodal
Gemini 2.5 Flash-Lite
$0.10/1M in
$0.40/1M out
Lowest cost, High volume