Gemini Veo 3.1 Fast - Ekly API

Google’s Veo 3.1 Fast video generation model with support for start/end frames and reference images


Model id	`veo-3.1-fast-generate-001`
Media	video
Submit to	`POST /v1/videos`
Price	5.5 credits per_second before discounts
Typical time	about 100.0 s

Request

Required: prompt
Optional: aspect_ratio, duration_seconds, first_frame, generate_audio, last_frame, quality, reference_images

{
  "model": "veo-3.1-fast-generate-001",
  "prompt": "Medium close-up, locked-off tripod, no camera movement. A middle-aged uncle in a cream kurta faces a cinema camera with dual monitors in a warm banquet hall. He says: Pehle mera asheerwad wala shot lo. Ambient noise: soft wedding hall murmur. No music. No subtitles. No captions. No on-screen text.",
  "aspect_ratio": "16:9",
  "duration_seconds": 8,
  "generate_audio": true,
  "quality": "720p"
}

Field	Allowed	Default
`aspect_ratio`	`16:9`, `9:16`	`"16:9"`
`duration_seconds`	4.0 – 8.0 seconds	`8`
`first_frame`	asset id (up to 1)
`generate_audio`	`true`, `false`	`true`
`last_frame`	asset id (up to 1)
`quality`	`1080p`, `720p`	`"720p"`
`reference_images`	asset ids (up to 3)

Reference inputs take asset ids from POST /v1/uploads or an earlier output’s asset_id. Prices and allowed values come from the live catalog; GET /v1/models/veo-3.1-fast-generate-001 is always current.