Veo 3.1 Lite & Voice Narration

Table of contents

  1. Voice Narration — AI voices for video dialogue
  2. Veo 3.1 Lite — fast and affordable
  3. Available voice presets

Google Flow API v1 now supports Veo 3.1 Lite — a faster, cheaper model at just 5 credits ($0.025) per video — and voice narration with 30 AI voice presets for adding spoken dialogue to generated videos.

Voice Narration — AI voices for video dialogue

Add a voice parameter to any R2V (reference image) generation to include AI narration. 30 voice presets are available — preview them in the Try It section.

Reference image

Zephyr voice preview
curl -X POST \
     -H "Authorization: Bearer user:12345-…" \
     -H "Content-Type: application/json" \
     -d '{
       "prompt": "A lady says to the dog, '\''Say meow meow meow.'\'' The dog looks at the lady with a surprised and frustrated look and woofs in a human voice, '\''What the heck lady?!'\''",
       "model": "veo-3.1-fast-relaxed",
       "aspectRatio": "portrait",
       "referenceImage_1": "user:12345-email:…-image:abcde-…",
       "voice": "zephyr"
     }' \
     "https://api.useapi.net/v1/google-flow/videos"

Veo 3.1 Lite — fast and affordable

veo-3.1-lite generates videos at 5 credits ($0.025) per video — half the cost of Veo 3.1 Fast. Supports text-to-video, start frame (I2V), and start+end frame interpolation (I2V-FL).

Model Cost Modes
veo-3.1-quality 100 credits / $0.50 T2V, I2V, I2V-FL
veo-3.1-fast 10 credits / $0.05 T2V, I2V, I2V-FL, R2V, Voice
veo-3.1-fast-relaxed free (Ultra only) T2V, I2V, I2V-FL, R2V, Voice
veo-3.1-lite 5 credits / $0.025 T2V, I2V, I2V-FL 
curl -X POST \
     -H "Authorization: Bearer user:12345-…" \
     -H "Content-Type: application/json" \
     -d '{
       "prompt": "A calm river flowing through a green valley with morning mist",
       "model": "veo-3.1-lite",
       "aspectRatio": "landscape"
     }' \
     "https://api.useapi.net/v1/google-flow/videos"

Available voice presets

30 voice presets with astronomical names. Preview any voice at https://www.gstatic.com/aistudio/voices/samples/{Name}.wav

Achird, Achernar, Algieba, Algenib, 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