PlatformTEXT → AUDIO · Google
Gemini 3.1 Flash TTS
Gemini 3.1 Flash TTS is Google's Gemini-based speech model, which follows natural-language instructions for tone and pacing.
PRICE0.28125 creditsper 1k chars
AVG TIME~5.0sestimate
OUTPUTaudiosync
Inputs
promptoptional · text
textoptional · Text — artifact id or https URL
params.voiceAchernar | Achird | Algenib | Algieba | Alnilam | Aoede | Autonoe | Callirrhoe | Charon | Despina | Enceladus | Erinome | Fenrir | Gacrux | Iapetus | Kore | Laomedeia | Leda | Orus | Puck | Pulcherrima | Rasalgethi | Sadachbia | Sadaltager | Schedar | Sulafat | Umbriel | Vindemiatrix | Zephyr | Zubenelgenubi · default Achernar
Monthly estimate
1,000 × 0.28125 credits281.25 credits
curl https://platform.4i.app/api/v1/run \
-H "Authorization: Bearer $FOURI_KEY" \
-H "Content-Type: application/json" \
-d '{
"service": "google/gemini-3-1-flash-tts",
"input": {},
"params": {
"voice": "Achernar"
}
}'Every output has an artifact_id. Pass it as input to any compatible service.