Video

Veo 3.1 API

Veo 3.1 is the current version of Google's Veo 3 video model family. APIMart serves it through three Ext models (veo3.1-lite, veo3.1-fast, veo3.1-quality, billed per 8-second video) and two official-channel models (veo3.1-fast-official, veo3.1-quality-official, billed per second), all with one API key.

Commercial Use

Get API Key API Docs

Service Highlights

Official Discounts
Pay-as-you-go
Fast & Low Latency

Input

Model

Prompt

35 characters

Duration

Aspect Ratio

Resolution

Generation Type

Enable GIF

Official Channel Fallback

First Frame

Last Frame

Content Moderation

Output

Video link valid for 72 hours

Veo 3.1 API Pricing

Transparent pricing with no hidden fees. Pay only for what you use.

Variant	Tier	GoldCurrent price	Platinum	Diamond	Official	Your savings
`veo3.1-fast-ext（veo3.1-fast）`	720P/1080P	1.4Credits(~$0.14)/gen	1.33Credits(~$0.133)/gen	1.26Credits(~$0.126)/gen	1.75Credits(~$0.175)/gen	20%
`veo3.1-fast-ext（veo3.1-fast）`	4K	6.4Credits(~$0.64)/gen	6.08Credits(~$0.608)/gen	5.76Credits(~$0.576)/gen	8Credits(~$0.8)/gen	20%
`veo3.1-quality-ext（veo3.1-quality）`	720P/1080P	10Credits(~$1)/gen	9.5Credits(~$0.95)/gen	9Credits(~$0.9)/gen	12.5Credits(~$1.25)/gen	20%
`veo3.1-quality-ext（veo3.1-quality）`	4K	15Credits(~$1.5)/gen	14.25Credits(~$1.425)/gen	13.5Credits(~$1.35)/gen	18.75Credits(~$1.875)/gen	20%
`veo3.1-lite-ext（veo3.1-lite）`	720P/1080P	0.7Credits(~$0.07)/gen	0.665Credits(~$0.0665)/gen	0.63Credits(~$0.063)/gen	0.875Credits(~$0.0875)/gen	20%
`veo3.1-lite-ext（veo3.1-lite）`	4K	5.7Credits(~$0.57)/gen	5.415Credits(~$0.5415)/gen	5.13Credits(~$0.513)/gen	7.125Credits(~$0.7125)/gen	20%
`veo3.1-fast-official`	720P	0.64Credits(~$0.064)/sec	0.608Credits(~$0.0608)/sec	0.576Credits(~$0.0576)/sec	0.8Credits(~$0.08)/sec	20%
	720P+audio	0.8Credits(~$0.08)/sec	0.76Credits(~$0.076)/sec	0.72Credits(~$0.072)/sec	1Credits(~$0.1)/sec	20%
	1080P	0.8Credits(~$0.08)/sec	0.76Credits(~$0.076)/sec	0.72Credits(~$0.072)/sec	1Credits(~$0.1)/sec	20%
	1080P+audio	0.96Credits(~$0.096)/sec	0.912Credits(~$0.0912)/sec	0.864Credits(~$0.0864)/sec	1.2Credits(~$0.12)/sec	20%
	4K	2Credits(~$0.2)/sec	1.9Credits(~$0.19)/sec	1.8Credits(~$0.18)/sec	2.5Credits(~$0.25)/sec	20%
	4K+audio	2.4Credits(~$0.24)/sec	2.28Credits(~$0.228)/sec	2.16Credits(~$0.216)/sec	3Credits(~$0.3)/sec	20%
`veo3.1-quality-official`	720P	1.6Credits(~$0.16)/sec	1.52Credits(~$0.152)/sec	1.44Credits(~$0.144)/sec	2Credits(~$0.2)/sec	20%
	1080P	1.6Credits(~$0.16)/sec	1.52Credits(~$0.152)/sec	1.44Credits(~$0.144)/sec	2Credits(~$0.2)/sec	20%
	720P+audio	3.2Credits(~$0.32)/sec	3.04Credits(~$0.304)/sec	2.88Credits(~$0.288)/sec	4Credits(~$0.4)/sec	20%
	1080P+audio	3.2Credits(~$0.32)/sec	3.04Credits(~$0.304)/sec	2.88Credits(~$0.288)/sec	4Credits(~$0.4)/sec	20%
	4K	3.2Credits(~$0.32)/sec	3.04Credits(~$0.304)/sec	2.88Credits(~$0.288)/sec	4Credits(~$0.4)/sec	20%
	4K+audio	4.8Credits(~$0.48)/sec	4.56Credits(~$0.456)/sec	4.32Credits(~$0.432)/sec	6Credits(~$0.6)/sec	20%

* Actual costs are subject to final output.

Veo 3.1 API: Google Veo 3 Video Generation with Lite, Fast and Quality Models

Call Google's Veo 3.1 API on APIMart for text to video and image to video. Use veo3.1-lite for low-cost batches, veo3.1-fast for previews and iteration, and veo3.1-quality for final production; switch to the official channel when you need 4, 6 or 8-second clips, an audio switch or a negative prompt. Output runs from 720p to 4K, and finished clips can be extended to 15 seconds.

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Key Features of the Veo 3.1 API

What you can build with Veo 3.1 on APIMart, and which model or channel supports each option

Text to Video with the Veo 3.1 API

Send a prompt to veo3.1-lite, veo3.1-fast or veo3.1-quality and get an 8-second video in 16:9 landscape or 9:16 portrait. Describe subject, action, camera movement, lighting and sound in one prompt.

Veo 3.1 Image to Video: First and Last Frame

Pass two images in image_urls with generation_type set to frame: the first image becomes the start frame and the second the end frame, and Veo 3.1 animates the motion between them. Available on veo3.1-fast and veo3.1-quality.

Reference Images for Consistent Characters

Use generation_type reference with up to 3 images (JPEG, PNG or WebP, up to 10MB each) to keep a character, product or style consistent. Reference mode works on veo3.1-fast; veo3.1-quality supports first and last frame only.

Extend Veo 3.1 Videos to 15 Seconds

Continue a finished 8-second clip to 15 seconds with the remix endpoint (POST /v1/videos/{task_id}/remix). Only veo3.1-fast and veo3.1-quality clips can be extended (not veo3.1-lite); use the same model as the original video, and set raw to true if you only want the extended part back.

720p, 1080p and 4K Output

Choose resolution per request: 720p (default), 1080p or 4k. Ext models can also return a GIF at 720p for previews; GIF cannot be combined with 1080p or 4K.

Veo 3.1 Lite, Fast and Quality

veo3.1-lite is the lightweight model for low-cost batch generation (text to video only on APIMart), veo3.1-fast suits quick previews and iteration, and veo3.1-quality is meant for final production. Each tier has its own price in the table above.

Official Veo 3.1 Channel

veo3.1-fast-official and veo3.1-quality-official add 4, 6 or 8-second durations, negative_prompt, seed, a generate_audio switch, first and last frame images and a person generation policy, at 720p, 1080p or 4K. They are billed per second, with separate rates for video with audio.

Veo 3.1 Synchronized Audio

Veo 3.1 can generate dialogue, sound effects and ambience that match the picture. Put spoken lines in quotation marks and describe sounds explicitly; on the official channel you turn audio on or off with generate_audio.

Real-World Veo 3.1 Video Applications

How businesses and creators use Veo 3.1 API with veo3.1-fast and veo3.1-quality for professional video production

Veo 3.1 Branded Content & Marketing

Create professional marketing videos with Veo 3.1 synchronized audio and precise cinematic controls. Use veo3.1-fast for rapid campaign iterations and veo3.1-quality for final deliverables—perfect for social media campaigns, product launches, and brand storytelling.

Veo 3.1 Educational Videos

Generate engaging educational content with Veo 3.1 natural dialogue and synchronized sound effects. Use veo3.1-quality for polished training videos, course content, and explainer videos with multi-shot continuity, or veo3.1-fast for quick previews.

Veo 3.1 Narrative Storytelling

Plan a story as a series of 8-second Veo 3.1 shots, extend key shots to 15 seconds with remix, and edit them together. Draft with veo3.1-fast, then render final cuts with veo3.1-quality, using first and last frames to keep transitions under control.

Veo 3.1 Product Demonstrations

Transform product images into dynamic Veo 3.1 video demonstrations with synchronized audio. Use veo3.1-fast for rapid prototypes and veo3.1-quality for polished product showcases with camera movements and professional lighting.

Veo 3.1 Corporate Communications

Create professional Veo 3.1 corporate videos with natural dialogue and controlled cinematography. Use veo3.1-quality for polished internal communications and training materials, or veo3.1-fast for quick drafts and presentations.

Veo 3.1 Creative Production

Rapid prototyping for directors and cinematographers with Veo 3.1. Experiment with veo3.1-fast for shot compositions, camera angles, and audio-visual pacing before investing in full production, then finalize with veo3.1-quality for cinematic output.

How to Get a Veo 3.1 API Key and Start Building

From signup to your first Veo 3.1 video on APIMart

Create Your Veo 3.1 API Key

Sign up on APIMart and create an API key on the API Keys page. The key works for every Veo 3.1 model: start with veo3.1-lite or veo3.1-fast for tests, then move to veo3.1-quality or the official channel for final videos. See this page's live pricing table for current prices and discounts.

→

Write Your Veo 3.1 Prompt

Describe subject, setting, action, camera movement, lighting and style. Put dialogue in quotation marks and name sound effects, and add a start and end frame or reference images when the shot has to match existing visuals.

→

Generate Your Veo 3.1 Video

Call POST /v1/videos/generations with your model, prompt, aspect ratio and resolution, then poll the task until it completes. Extend a finished Ext clip to 15 seconds with the remix endpoint if you need a longer shot.

Get Veo 3.1 API Key

Veo 3.1 API Example: Text to Video and Image to Video

Call Google Veo 3.1 on APIMart with one POST request. Veo 3.1 API generation is asynchronous: submit a task, then poll the task endpoint to get the video URL.

1
Authenticate Veo 3.1 API requests
Save the key you created above in the APIMART_API_KEY environment variable and send it as Authorization: Bearer <key> on every Veo 3.1 API request.
2
Submit a Veo 3.1 task
POST /v1/videos/generations with model veo3.1-fast, your prompt, aspect_ratio and resolution. Add image_urls and generation_type frame for first and last frame image to video. The Veo 3.1 API responds with a task_id.
3
Get the Veo 3.1 result
Poll GET /v1/tasks/{task_id} every 5–15 seconds until status is completed, then read the video URL from data.result.videos[0].url[0] and save it within 72 hours. Failed Veo 3.1 tasks are not charged.
See the Veo 3.1 API reference for every parameter, the official channel and the remix endpoint.

POST /v1/videos/generations

curl -X POST https://api.apimart.ai/v1/videos/generations \
  -H "Authorization: Bearer $APIMART_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "veo3.1-fast",
    "prompt": "A cinematic drone shot over a misty mountain lake at sunrise, a lone canoe gliding across the water, birdsong and gentle wind",
    "duration": 8,
    "aspect_ratio": "16:9",
    "resolution": "720p"
  }'

import os
import time
import requests

API_BASE = "https://api.apimart.ai"
headers = {"Authorization": f"Bearer {os.environ['APIMART_API_KEY']}"}

# 1. Submit the generation task
payload = {
  "model": "veo3.1-fast",
  "prompt": "A cinematic drone shot over a misty mountain lake at sunrise, a lone canoe gliding across the water, birdsong and gentle wind",
  "duration": 8,
  "aspect_ratio": "16:9",
  "resolution": "720p"
}
resp = requests.post(f"{API_BASE}/v1/videos/generations", headers=headers, json=payload, timeout=60)
resp.raise_for_status()
task_id = resp.json()["data"][0]["task_id"]

# 2. Poll the task until it finishes
for _ in range(200):
    task_resp = requests.get(f"{API_BASE}/v1/tasks/{task_id}", headers=headers, timeout=30)
    task_resp.raise_for_status()
    task = task_resp.json()["data"]
    if task["status"] == "completed":
        print(task["result"]["videos"][0]["url"][0])
        break
    if task["status"] == "failed":
        raise RuntimeError(task.get("error", {}).get("message", "generation failed"))
    time.sleep(10)
else:
    raise TimeoutError(f"task {task_id} did not finish in time; continue GET polling with this task ID")

curl -X POST https://api.apimart.ai/v1/videos/generations \
  -H "Authorization: Bearer $APIMART_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "veo3.1-fast",
    "prompt": "The camera slowly pushes in from the first frame to the last frame as morning light spreads across the scene, soft ambient sound",
    "duration": 8,
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "generation_type": "frame",
    "image_urls": [
      "https://example.com/first-frame.jpg",
      "https://example.com/last-frame.jpg"
    ]
  }'

TASK_ID="task_xxx"  # replace with the task_id returned by the POST request
curl "https://api.apimart.ai/v1/tasks/$TASK_ID" \
  -H "Authorization: Bearer $APIMART_API_KEY"

Veo 3.1 API Parameters

Parameter	Type	Required	Default	Description
`model`	string	Required	Default: veo3.1-fast	veo3.1-lite, veo3.1-fast or veo3.1-quality (the -ext aliases work the same). Official-channel models use the generation-official endpoint parameters.
`prompt`	string	Required	Default: —	Video description, including subject, action, camera, lighting and sound.
`duration`	integer	Optional	Default: 8	Fixed at 8 seconds on Ext models. Extend a finished clip to 15 seconds with the remix endpoint.
`aspect_ratio`	string	Optional	Default: —	16:9 (landscape) or 9:16 (portrait).
`resolution`	string	Optional	Default: 720p	720p, 1080p or 4k.
`image_urls`	array	Optional	Default: —	Up to 3 public image URLs (JPEG, PNG or WebP, up to 10MB each). Not supported by veo3.1-lite.
`generation_type`	string	Optional	Default: —	frame (first image = start frame, second = end frame) or reference (reference images; not on veo3.1-quality). Defaults by image count. Not supported by veo3.1-lite.
`enable_gif`	boolean	Optional	Default: false	Return a GIF. Cannot be combined with 1080p or 4k.
`official_fallback`	boolean	Optional	Default: false	true uses the official channel as a fallback. Not supported by veo3.1-lite.
`nsfw_check`	boolean	Optional	Default: false	Moderate the prompt and input images with omni-moderation-latest before the task is submitted.

Veo 3.1 API User Reviews on APIMart

What developers and businesses say about Veo 3.1 veo3.1-fast and veo3.1-quality on APIMart

“Veo 3.1 veo3.1-quality model delivers remarkable audio improvement. Our educational Veo 3.1 videos now have natural-sounding dialogue that's perfectly synced with the visuals. Students engage much more with veo3.1-quality content.”

Dr. Emily Zhang

E-Learning Director

“Veo 3.1 scene extension with veo3.1-fast is a game-changer for our marketing campaigns. We create 2+ minute stories by connecting veo3.1-fast clips seamlessly, maintaining character consistency throughout.”

Michael Roberts

Creative Director

“The Veo 3.1 reference image feature in veo3.1-quality lets us maintain brand consistency across all our video content. Upload style guide images and every veo3.1-quality generation matches our visual identity perfectly.”

Sofia Andersson

Brand Manager

“Veo 3.1 veo3.1-fast is perfect for rapid prototyping. We test dozens of variations quickly with veo3.1-fast, then finalize with veo3.1-quality for client deliverables. The Veo 3.1 workflow is incredibly efficient.”

Lucas Huang

Video Producer

“Veo 3.1 cinematic controls in veo3.1-quality are far superior to competitors. Being able to specify exact camera movements and lighting cues in veo3.1-quality gives us the precision we need for professional productions.”

Aisha Patel

Film Director

“With Veo 3.1 veo3.1-fast, 35% better prompt adherence means fewer iterations. Our complex product demo prompts now work the first time with veo3.1-fast, saving time and reducing Veo 3.1 API costs significantly.”

Thomas Klein

Product Marketing Lead

Veo 3.1 API FAQ

Models, pricing, image to video, extension and access for the Veo 3.1 API on APIMart

What is the Veo 3 API, and how is Veo 3.1 related to Veo 3?

"Veo 3 API" (often written veo3 api) means programmatic access to Google's Veo 3 video model family. Veo 3.1 is its current version, and it is what APIMart serves: veo3.1-lite, veo3.1-fast and veo3.1-quality on the Ext channel, plus veo3.1-fast-official and veo3.1-quality-official on the official channel, all under one API key and one set of docs.

Which Veo 3.1 models can I call on APIMart?

Five model IDs. Ext: veo3.1-lite (low-cost, text to video only), veo3.1-fast (previews and iteration) and veo3.1-quality (final production), each also accepted with an -ext suffix. Official: veo3.1-fast-official and veo3.1-quality-official, which add 4/6/8-second durations, negative_prompt, seed and an audio switch.

How much does the Veo 3.1 API cost?

Ext models are billed per 8-second video by model and resolution (720p and 1080p share a price, 4K costs more); veo3.1-lite is the cheapest. Official models are billed per second, with a higher rate for video with audio. The table on this page shows live Gold member prices (20% off); Platinum and Diamond members save up to 28%. Failed requests are not charged.

Should I use the Ext or the official Veo 3.1 channel?

Use Ext (veo3.1-lite, veo3.1-fast, veo3.1-quality) for a flat price per 8-second clip, reference-image mode, GIF output and the 15-second remix. Use the official channel (veo3.1-fast-official, veo3.1-quality-official) when you need 4 or 6-second clips, negative_prompt, seed, generate_audio or person_generation control.

Can Veo 3.1 do image to video?

Yes. On veo3.1-fast and veo3.1-quality, send up to 3 images in image_urls: generation_type frame uses the first image as the start frame and the second as the end frame, and reference (veo3.1-fast only) uses up to 3 images as references. Images must be public JPEG, PNG or WebP URLs up to 10MB. On the official channel use first_frame_image and last_frame_image. On APIMart, veo3.1-lite is text to video only.

Can I make Veo 3.1 videos longer than 8 seconds?

Yes, up to 15 seconds. After an Ext video task succeeds, call POST /v1/videos/{task_id}/remix with the same model (veo3.1-fast or veo3.1-quality) and a continuation prompt. The remix returns a new task ID; set raw to true to get only the extended part. Longer pieces are built by editing several clips together.

What resolutions, aspect ratios and durations does Veo 3.1 support?

All models support 720p (default), 1080p and 4K in 16:9 or 9:16. Ext clips are always 8 seconds, and Ext can return a GIF at 720p. Official clips can be 4, 6 or 8 seconds (8 by default).

How does audio work in the Veo 3.1 API?

Veo 3.1 can generate synchronized dialogue, sound effects and ambience. Write speech in quotation marks ('A man says, "Hello"') and describe sounds explicitly ('SFX: car engine starts'). On the official channel set generate_audio to true to add an audio track, which is billed at the with-audio rate; Ext models have no audio switch.

How do I get a Veo 3 API key for Veo 3.1?

Sign up for an APIMart account, open the API Keys page and create a key; an API key is required for every Veo request. The same key works as your Veo 3 / Veo 3.1 API key and for every other model on APIMart, with pay-as-you-go billing and no subscription.

How do I call the Veo 3.1 API?

POST /v1/videos/generations with a model such as veo3.1-fast and your prompt. Generation is asynchronous: the response contains a task_id, and you poll GET /v1/tasks/{task_id} until the task completes, then read the video from data.result.videos[0].url[0]. Download it within 72 hours. The example section above has copy-ready cURL and Python code.

Is the Veo 3 / Veo 3.1 API free?

No. There is no free quota for the Veo 3.1 API on APIMart. Billing is pay-as-you-go: failed requests are not charged, and every price on this page already includes the 20% membership discount.

When was Veo 3.1 released?

Google released Veo 3.1 and Veo 3.1 Fast on October 15, 2025, as a paid preview in the Gemini API, Google AI Studio and Vertex AI, and added Veo 3.1 Lite, its most cost-effective Veo model, on March 31, 2026. On APIMart, Veo 3.1 is available through veo3.1-lite, veo3.1-fast, veo3.1-quality and the official channel.

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Veo 3.1 API FAQ

Models, pricing, image to video, extension and access for the Veo 3.1 API on APIMart

What is the Veo 3 API, and how is Veo 3.1 related to Veo 3?

Which Veo 3.1 models can I call on APIMart?

How much does the Veo 3.1 API cost?

Should I use the Ext or the official Veo 3.1 channel?

Can Veo 3.1 do image to video?

Can I make Veo 3.1 videos longer than 8 seconds?

What resolutions, aspect ratios and durations does Veo 3.1 support?

All models support 720p (default), 1080p and 4K in 16:9 or 9:16. Ext clips are always 8 seconds, and Ext can return a GIF at 720p. Official clips can be 4, 6 or 8 seconds (8 by default).

How does audio work in the Veo 3.1 API?

How do I get a Veo 3 API key for Veo 3.1?

How do I call the Veo 3.1 API?

Is the Veo 3 / Veo 3.1 API free?

No. There is no free quota for the Veo 3.1 API on APIMart. Billing is pay-as-you-go: failed requests are not charged, and every price on this page already includes the 20% membership discount.

Veo 3.1 API

Veo 3.1 API Pricing

Veo 3.1 API: Google Veo 3 Video Generation with Lite, Fast and Quality Models

Key Features of the Veo 3.1 API

Real-World Veo 3.1 Video Applications

How to Get a Veo 3.1 API Key and Start Building

Create Your Veo 3.1 API Key

Write Your Veo 3.1 Prompt

Generate Your Veo 3.1 Video

Veo 3.1 API Example: Text to Video and Image to Video

Authenticate Veo 3.1 API requests

Submit a Veo 3.1 task

Get the Veo 3.1 result

Veo 3.1 API Parameters

Veo 3.1 API User Reviews on APIMart

Veo 3.1 API FAQ

What is the Veo 3 API, and how is Veo 3.1 related to Veo 3?

Which Veo 3.1 models can I call on APIMart?

How much does the Veo 3.1 API cost?

Should I use the Ext or the official Veo 3.1 channel?

Can Veo 3.1 do image to video?

Can I make Veo 3.1 videos longer than 8 seconds?

What resolutions, aspect ratios and durations does Veo 3.1 support?

How does audio work in the Veo 3.1 API?

How do I get a Veo 3 API key for Veo 3.1?

How do I call the Veo 3.1 API?

Is the Veo 3 / Veo 3.1 API free?

When was Veo 3.1 released?

Related Models

Latest Veo 3.1 articles

Key Features of the Veo 3.1 API

Real-World Veo 3.1 Video Applications

How to Get a Veo 3.1 API Key and Start Building

Create Your Veo 3.1 API Key

Write Your Veo 3.1 Prompt

Generate Your Veo 3.1 Video

Veo 3.1 API User Reviews on APIMart

Veo 3.1 API FAQ

What is the Veo 3 API, and how is Veo 3.1 related to Veo 3?

Which Veo 3.1 models can I call on APIMart?

How much does the Veo 3.1 API cost?

Should I use the Ext or the official Veo 3.1 channel?

Can Veo 3.1 do image to video?

Can I make Veo 3.1 videos longer than 8 seconds?

What resolutions, aspect ratios and durations does Veo 3.1 support?

How does audio work in the Veo 3.1 API?

How do I get a Veo 3 API key for Veo 3.1?

How do I call the Veo 3.1 API?

Is the Veo 3 / Veo 3.1 API free?

When was Veo 3.1 released?

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