Kling v3 (First+Last Frame)
Kling v3 (First+Last Frame) costs $0.840/clip on FairStack — a first/last frame model for Controlled video transitions, Morph effects, Start-to-end animation. 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 Kling v3 (First+Last Frame)?
Kling V3 Standard First+Last Frame is Kuaishou's keyframe interpolation model from the latest V3 generation. Users provide two images representing the desired start and end states of a video, and the model generates smooth, natural motion to transition between them. This gives precise creative control over both the opening and closing frames of the generated content. With per-second billing at $0.168 per second, users pay proportionally for the transition duration they need. The V3 generation delivers improved interpolation quality over earlier Kling versions, with more natural motion paths and better handling of complex transformations between visually different keyframes. The model works well for morphing effects, scene transitions, and controlled animations. Compared to text-to-video models where camera movement and scene progression are left to the AI's interpretation, first-and-last-frame generation provides deterministic control over the video's narrative arc. Against Veo 3.1 Fast FLF at $0.10 per second, Kling V3 Standard FLF is moderately more expensive but benefits from Kling's strong motion generation reputation. Best suited for controlled video transitions, morph effects, and start-to-end animation sequences. Available on FairStack at infrastructure cost plus a 20% platform fee.
Key Features
What are Kling v3 (First+Last Frame)'s strengths?
What are Kling v3 (First+Last Frame)'s limitations?
What is Kling v3 (First+Last Frame) best for?
How much does Kling v3 (First+Last Frame) cost?
How does Kling v3 (First+Last Frame) perform across capabilities?
Kling V3 Standard First-Last-Frame — anchor start and end
How do I use the Kling v3 (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": "kling-v3-std-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": "kling-v3-std-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: "kling-v3-std-flf",
prompt: "Your prompt here",
}),
}
);
const result = await response.json();
console.log(result.url);What parameters does Kling v3 (First+Last Frame) support?
Frequently Asked Questions
How much does Kling v3 (First+Last Frame) cost?
Kling v3 (First+Last Frame) costs $0.840/clip on FairStack as of 2026-03-23. 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 Kling v3 (First+Last Frame) and what is it best for?
Kling V3 Standard First+Last Frame is Kuaishou's keyframe interpolation model from the latest V3 generation. Users provide two images representing the desired start and end states of a video, and the model generates smooth, natural motion to transition between them. This gives precise creative control over both the opening and closing frames of the generated content. With per-second billing at $0.168 per second, users pay proportionally for the transition duration they need. The V3 generation delivers improved interpolation quality over earlier Kling versions, with more natural motion paths and better handling of complex transformations between visually different keyframes. The model works well for morphing effects, scene transitions, and controlled animations. Compared to text-to-video models where camera movement and scene progression are left to the AI's interpretation, first-and-last-frame generation provides deterministic control over the video's narrative arc. Against Veo 3.1 Fast FLF at $0.10 per second, Kling V3 Standard FLF is moderately more expensive but benefits from Kling's strong motion generation reputation. Best suited for controlled video transitions, morph effects, and start-to-end animation sequences. Available on FairStack at infrastructure cost plus a 20% platform fee. Kling v3 (First+Last Frame) is best for Controlled video transitions, Morph effects, Start-to-end animation. Available via FairStack's REST API with curl, Python, and Node.js SDKs.
Does Kling v3 (First+Last Frame) have an API?
Yes. Kling v3 (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 Kling v3 (First+Last Frame) compare to other video models?
Kling v3 (First+Last Frame) excels at Controlled video transitions, Morph effects, Start-to-end animation. It is a first/last frame model priced at $0.840/clip on FairStack. Key strengths: Precise start/end control, Good transition quality. Compare all video models at fairstack.ai/models.
What makes Kling v3 (First+Last Frame) stand out from other video models?
Kling v3 (First+Last Frame) is distinguished by precise start/end control and good transition quality. Generation typically completes in 5-15 seconds.
What are the known limitations of Kling v3 (First+Last Frame)?
Key limitations include: per-second at $0.168/s; requires two keyframes. FairStack documents these transparently so you can choose the right model for your workflow.
How fast is Kling v3 (First+Last Frame)?
Kling v3 (First+Last Frame) typically completes in 5-15 seconds. This provides a good balance between output quality and processing speed for most production workflows.
What video capabilities does Kling v3 (First+Last Frame) offer?
Kling v3 (First+Last Frame) offers: first and last frame specification; ai transitions; kling v3 quality; per-second billing. All capabilities are accessible through both the FairStack web interface and REST API.
Start using Kling v3 (First+Last Frame) today
$0.840/clip. Full API access. No subscription.
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