FLUX 3 API
Black Forest Labs video generation with audio, 5-20s at 720p or 1080p.
FLUX 3 is a video generation model from Black Forest Labs, available on OttoPort's OpenAI-compatible API as the model ID flux-3 at $0.213 / second as of 2026-10-14.
Provider
Black Forest Labs
Price
$0.213 / second
Model ID
flux-3
Type
video generation model
Create with FLUX 3
videoYour result appears here
Start with the example prompt or make it your own. Your OttoPort account is used securely for generation.
FLUX 3 API pricing
What OttoPort bills for FLUX 3, and what that works out to per unit. Rates are read from the same catalog the gateway meters against, and were current on 2026-10-14.
| Per second | $0.213 | |
|---|---|---|
| 5-second clip | $1.06 | |
| 8-second clip | $1.70 | |
| Seconds per $10 | 46 | of generated video |
No subscription and no minimum — OttoPort bills prepaid credits against usage. See the full rate card.
Call FLUX 3 in three lines
Send "model": "flux-3" to POST https://ottoport.ai/api/v1/videos/generations with an OttoPort key. No Black Forest Labs account, no waitlist, no separate SDK.
curl https://ottoport.ai/api/v1/videos/generations \
-H "Authorization: Bearer $OTTOPORT_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "flux-3",
"prompt": "cinematic product reveal, slow dolly, black background",
"duration": 5,
"aspect_ratio": "16:9"
}'import requests
job = requests.post(
"https://ottoport.ai/api/v1/videos/generations",
headers={"Authorization": "Bearer " + API_KEY},
json={
"model": "flux-3",
"prompt": "cinematic product reveal, slow dolly, black background",
"duration": 5,
"aspect_ratio": "16:9",
},
).json()
# Video is a job: poll it, or pass webhook_url and be told.
print(job["id"], job["status"])const res = await fetch("https://ottoport.ai/api/v1/videos/generations", {
method: "POST",
headers: {
Authorization: `Bearer ${API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "flux-3",
prompt: "cinematic product reveal, slow dolly, black background",
duration: 5,
aspect_ratio: "16:9",
}),
});
// Video is a job: poll it, or pass webhook_url and be told.
const job = await res.json();
console.log(job.id, job.status);Before you start
- 1. Create a key at /api-keys.
- 2. Top up credits — the smallest pack is $25.
- 3. Paste the request. It returns a job ID; poll it or pass a webhook_url.
Full reference at /docs, or drive it from an agent with the MCP server and CLI.
Request parameters
The body POST https://ottoport.ai/api/v1/videos/generations accepts for FLUX 3.
| Field | Type | Required | Notes |
|---|---|---|---|
| model | string | Yes | Always flux-3 for FLUX 3. |
| prompt | string | Yes | Subject, action, and camera movement. |
| duration | integer | No | Seconds of output. This is the billed unit. |
| resolution | string | No | One of: 720p, 1080p. Tiers above this model's base rate bill at a multiplier. |
| aspect_ratio | string | No | e.g. 16:9 or 9:16. |
| image_url | string | No | The first frame, for image-to-video. |
| video_url | string | No | An existing video to edit or extend. An edit runs, and bills, as long as this source. |
| video_task | string | No | What to do with video_url: "edit" (the default) or "extend". |
| webhook_url | string | No | Called when the job settles, so you need not poll. |
| webhook_secret | string | No | Signs the webhook so you can verify it came from OttoPort. |
FLUX 3 direct vs through OttoPort
FLUX 3 is the same model either way — what changes is how many accounts, keys, and integrations you carry to reach it.
| Black Forest Labs direct | Via OttoPort | |
|---|---|---|
| Accounts and keys | A Black Forest Labs account, plus one more for every other model you add | One OttoPort account and one key for the whole catalog |
| Request shape | Black Forest Labs's own SDK and response format | OpenAI-compatible — point baseURL at OttoPort and change the model string |
| Switching models | A new integration per provider | Replace flux-3 with any other model ID in the catalog |
| Billing | A separate invoice and contract per provider | Prepaid credits, no subscription, one usage ledger |
| Provider outages | Your call fails | Configured backup routes are tried in order on provider failure |
Describe the subject and action.
Add a camera movement.
Specify your output format.
FLUX 3 API questions
Cost, keys, and model IDs for FLUX 3 on OttoPort.
How much does the FLUX 3 API cost?
On OttoPort, FLUX 3 costs $0.213 / second as of 2026-10-14. For scale, 5-second clip: $1.06. Billing is prepaid usage with no subscription and no minimum, and the current rate is always published at ottoport.ai/pricing.
How do I get a FLUX 3 API key?
You do not need a Black Forest Labs key. Create an OttoPort account, generate a key at ottoport.ai/api-keys, and send it as "Authorization: Bearer <key>" to POST https://ottoport.ai/api/v1/videos/generations with "model": "flux-3". The same key reaches every other model in the catalog.
What is the model ID for FLUX 3?
The OttoPort model ID for FLUX 3 is flux-3. Pass it as the model field on POST https://ottoport.ai/api/v1/videos/generations, or list it programmatically from GET https://ottoport.ai/api/v1/models.
Is FLUX 3 generation synchronous?
No. POST https://ottoport.ai/api/v1/videos/generations returns a job ID immediately. Poll GET https://ottoport.ai/api/v1/videos/generations/{id} for status, or pass webhook_url and webhook_secret and OttoPort will call you when the job settles. You are billed per second of output, so a failed job costs nothing.
Do I need a Black Forest Labs account to use FLUX 3?
No. OttoPort connects to Black Forest Labs on your behalf, so one OttoPort account covers FLUX 3 and every other model in the catalog — no per-provider contracts, keys, or invoices.
Other video generation models on the same API
Same endpoint, same key — swapping model is a one-string change from flux-3.
Gemini Omni 1.1 Flash API
$0.138 / second
Gemini Omni Flash API
$0.156 / second
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$0.20 / second
Seedance 2.5 API
ByteDance
$0.35 / second
MiniMax H3 API
MiniMax
$0.163 / second
Seedance 2.0 API
ByteDance
$0.227 / second
Browse the full catalog — every model with its provider and per-unit price.