Black Forest LabsvideoNewOperational

FLUX 3 Video Text to Video API

Name: FLUX 3 Video API
Brand: Black Forest Labs
Availability: InStock

Text to Video with FLUX 3 Video by Black Forest Labs. FLUX goes video — 5–20 s clips with synced audio.

bfl/flux-3-video/text-to-video

FromUp to −5%

$0.143/s$0.15

per second of video · 720p

Open in Studio API

Try FLUX 3 Video Text to Video

Prompt*

0/5000

Aspect ratio

Output image shape.

Duration

Length of the generated clip in seconds (5–20s). You pay per second.

Generate audio

Generate synchronized sound, ambience and dialogue. No extra cost.

Estimated cost…

Create a free account with Google or email — pay only for what you generate.

Your video will appear here

Write a prompt, pick your settings and hit Run. You only pay for successful generations.

Also available: FLUX 3 Video Image to Video

FLUX 3 Video Text to Video API

POST/api/v1/run/bfl/flux-3-video/text-to-video

Submits an asynchronous job and returns 202 with a generation id. Poll GET /api/v1/generations/{id} or pass webhook_url. See job lifecycle.

Input parameters

Name	Type	Description	Affects price
`prompt`required	string	Describe the shot: subject, action, camera movement, lighting and style.	No
`aspect_ratio`	string (enum)	Output image shape. Values: 16:9 · 9:16 · 1:1 · 4:3 · 3:4 · 21:9 · 2:1 Default: 16:9	Yes
`duration`	integer	Length of the generated clip in seconds (5–20s). You pay per second. Range: 5–20s Default: 5	Yes
`generate_audio`	boolean	Generate synchronized sound, ambience and dialogue. No extra cost. Default: true	No
`webhook_url`	string (URL)	Optional. We POST the finished generation here, signed with your webhook secret. Webhooks	No

Request

curl -X POST https://cheapergen.com/api/v1/run/bfl/flux-3-video/text-to-video \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "A hot-air balloon drifts over Cappadocia at sunrise, the burner roars, the camera rises alongside the basket",
  "aspect_ratio": "16:9",
  "duration": 5
}'

import os, time, requests

API = "https://cheapergen.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['CHEAPERGEN_API_KEY']}"}

# 1. Submit the job
job = requests.post(f"{API}/run/bfl/flux-3-video/text-to-video", headers=headers, json={
    "prompt": "A hot-air balloon drifts over Cappadocia at sunrise, the burner roars, the camera rises alongside the basket",
    "aspect_ratio": "16:9",
    "duration": 5
}).json()

# 2. Poll until it finishes (or pass "webhook_url" and skip polling)
while job["status"] in ("queued", "running"):
    time.sleep(3)
    job = requests.get(f"{API}/generations/{job['id']}", headers=headers).json()

print(job["status"], job["output"]["video"]["url"] if job["status"] == "succeeded" else job["error"])

const API = "https://cheapergen.com/api/v1";
const headers = {
  Authorization: `Bearer ${process.env.CHEAPERGEN_API_KEY}`,
  "Content-Type": "application/json",
};

// 1. Submit the job
let job = await fetch(`${API}/run/bfl/flux-3-video/text-to-video`, {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "A hot-air balloon drifts over Cappadocia at sunrise, the burner roars, the camera rises alongside the basket",
    "aspect_ratio": "16:9",
    "duration": 5
  }),
}).then((r) => r.json());

// 2. Poll until it finishes (or pass webhook_url and skip polling)
while (job.status === "queued" || job.status === "running") {
  await new Promise((r) => setTimeout(r, 3000));
  job = await fetch(`${API}/generations/${job.id}`, { headers }).then((r) => r.json());
}

console.log(job.status === "succeeded" ? job.output.video.url : job.error);

Response

{
  "id": "gen_8c2QmX1nq0k4",
  "object": "generation",
  "model": "bfl/flux-3-video",
  "endpoint": "bfl/flux-3-video/text-to-video",
  "mode": "text-to-video",
  "status": "queued",
  "input": {
    "prompt": "A hot-air balloon drifts over Cappadocia at sunrise, the burner roars, the camera rises alongside the basket",
    "aspect_ratio": "16:9",
    "duration": 5
  },
  "output": null,
  "error": null,
  "cost": {
    "amount_usd": 0.2255,
    "currency": "usd",
    "estimated": true,
    "official_usd": null,
    "saved_usd": null
  },
  "source": "api",
  "started_at": null,
  "completed_at": null,
  "urls": {
    "get": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4",
    "cancel": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4/cancel"
  },
  "created_at": "2026-10-15T09:21:04Z"
}

{
  "id": "gen_8c2QmX1nq0k4",
  "object": "generation",
  "model": "bfl/flux-3-video",
  "endpoint": "bfl/flux-3-video/text-to-video",
  "mode": "text-to-video",
  "status": "succeeded",
  "input": {
    "prompt": "A hot-air balloon drifts over Cappadocia at sunrise, the burner roars, the camera rises alongside the basket",
    "aspect_ratio": "16:9",
    "duration": 5
  },
  "output": {
    "video": {
      "url": "https://cdn.cheapergen.ai/outputs/gen_8c2Q.mp4",
      "content_type": "video/mp4",
      "duration": 5,
      "width": 1280,
      "height": 720
    }
  },
  "error": null,
  "cost": {
    "amount_usd": 0.2255,
    "currency": "usd",
    "estimated": false,
    "official_usd": 0.264,
    "saved_usd": 0.0385
  },
  "source": "api",
  "created_at": "2026-10-15T09:21:04Z",
  "started_at": "2026-10-15T09:21:06Z",
  "completed_at": "2026-10-15T09:22:31Z"
}

FLUX 3 Video pricing

Pay per second of video. No subscription. Failed generations are refunded automatically.

Tier	Official price	Cheaper Gen.	You save
720p audio included	~~$0.15~~/s	$0.143/s	−5%

Official price: BFL API list price for FLUX 3 Video at 720p ($0.15 per second, audio included). Prices verified 2026-10-16.
1080p and above are not offered yet: our channel's rate there is above BFL's own price.

About FLUX 3 Video All FLUX 3 Video endpoints