Veo 3.1 (First+Last Frame)
Veo 3.1 (First+Last Frame) costs $2.40/clip on FairStack — a first/last frame model for Scene transitions, Precise motion control, Music videos. No subscription required. Pay per generation with full REST API access. FairStack applies a transparent 20% margin on infrastructure cost so you always see the real price.
What is Veo 3.1 (First+Last Frame)?
Veo 3.1 First/Last Frame is Google DeepMind's premium keyframe interpolation model that generates high-quality video from a starting and ending frame. Users define the visual state at the beginning and end of the clip, and the model creates smooth, physics-aware motion to transition between them with optional synchronized audio generation. With per-second billing at $0.20 per second without audio, the model supports output up to 1080p quality and up to 8 seconds duration. Enabling audio doubles the per-second cost, and 4K output also doubles the base price. The Veo 3.1 architecture produces premium visual quality with natural motion interpolation. Compared to Kling V3 Standard FLF at $0.168 per second, Google's offering costs slightly more but brings the Veo architecture's superior physics understanding. The optional audio generation is unique among FLF models, eliminating a separate audio production step. Best suited for precise scene transitions, controlled motion between keyframes, and professional productions where start-and-end-frame control with optional audio enhances creative control. Available on FairStack at infrastructure cost plus a 20% platform fee.
Key Features
What are Veo 3.1 (First+Last Frame)'s strengths?
What are Veo 3.1 (First+Last Frame)'s limitations?
What is Veo 3.1 (First+Last Frame) best for?
How much does Veo 3.1 (First+Last Frame) cost?
How does Veo 3.1 (First+Last Frame) perform across capabilities?
How do I use the Veo 3.1 (First+Last Frame) API?
curl -X POST https://api.fairstack.ai/v1/generations/video \
-H "Authorization: Bearer $FAIRSTACK_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "veo-3-1-flf",
"prompt": "Your prompt here"
}'import requests
response = requests.post(
"https://api.fairstack.ai/v1/generations/video",
headers={
"Authorization": f"Bearer {FAIRSTACK_API_KEY}",
"Content-Type": "application/json",
},
json={
"model": "veo-3-1-flf",
"prompt": "Your prompt here",
},
)
result = response.json()
print(result["url"])const response = await fetch(
"https://api.fairstack.ai/v1/generations/video",
{
method: "POST",
headers: {
Authorization: `Bearer ${process.env.FAIRSTACK_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "veo-3-1-flf",
prompt: "Your prompt here",
}),
}
);
const result = await response.json();
console.log(result.url);What parameters does Veo 3.1 (First+Last Frame) support?
Frequently Asked Questions
How much does Veo 3.1 (First+Last Frame) cost?
Veo 3.1 (First+Last Frame) costs $2.40/clip on FairStack as of 2026-05-13. This price includes FairStack's transparent 20% margin on infrastructure cost. No subscription or monthly fee — you pay per generation only. Minimum deposit is $1.
What is Veo 3.1 (First+Last Frame) and what is it best for?
Veo 3.1 First/Last Frame is Google DeepMind's premium keyframe interpolation model that generates high-quality video from a starting and ending frame. Users define the visual state at the beginning and end of the clip, and the model creates smooth, physics-aware motion to transition between them with optional synchronized audio generation. With per-second billing at $0.20 per second without audio, the model supports output up to 1080p quality and up to 8 seconds duration. Enabling audio doubles the per-second cost, and 4K output also doubles the base price. The Veo 3.1 architecture produces premium visual quality with natural motion interpolation. Compared to Kling V3 Standard FLF at $0.168 per second, Google's offering costs slightly more but brings the Veo architecture's superior physics understanding. The optional audio generation is unique among FLF models, eliminating a separate audio production step. Best suited for precise scene transitions, controlled motion between keyframes, and professional productions where start-and-end-frame control with optional audio enhances creative control. Available on FairStack at infrastructure cost plus a 20% platform fee. Veo 3.1 (First+Last Frame) is best for Scene transitions, Precise motion control, Music videos. Available via FairStack's REST API with curl, Python, and Node.js SDKs.
Does Veo 3.1 (First+Last Frame) have an API?
Yes. Veo 3.1 (First+Last Frame) is available via FairStack's REST API at api.fairstack.ai. Send a POST request to /v1/generations/video with your API key and prompt. Works with curl, Python requests, Node.js fetch, and any HTTP client. No SDK installation required.
How does Veo 3.1 (First+Last Frame) compare to other video models?
Veo 3.1 (First+Last Frame) excels at Scene transitions, Precise motion control, Music videos. It is a first/last frame model priced at $2.40/clip on FairStack. Key strengths: Premium Google video quality, Precise start/end frame control. Compare all video models at fairstack.ai/models.
What makes Veo 3.1 (First+Last Frame) stand out from other video models?
Veo 3.1 (First+Last Frame) is distinguished by premium google video quality and precise start/end frame control. Generation typically takes 15-60 seconds due to its higher-quality processing.
What are the known limitations of Veo 3.1 (First+Last Frame)?
Key limitations include: expensive at $0.20/s without audio; max 8 seconds; 4k doubles the price. FairStack documents these transparently so you can choose the right model for your workflow.
How fast is Veo 3.1 (First+Last Frame)?
Veo 3.1 (First+Last Frame) typically takes 15-60 seconds due to its higher-quality processing. The longer processing time reflects its advanced architecture, which produces higher-quality results than faster alternatives.
What video capabilities does Veo 3.1 (First+Last Frame) offer?
Veo 3.1 (First+Last Frame) offers: first+last frame interpolation; 1080p quality output; optional audio generation; up to 8 seconds. All capabilities are accessible through both the FairStack web interface and REST API.
Start using Veo 3.1 (First+Last Frame) today
$2.40/clip. Full API access. No subscription.
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