The duration of the generated video, in seconds.
The taskId must be a valid taskId returned from the video generation interface. Note: Video generated after 1080P cannot be extended.
Describe the text prompt for extending the video content.
If provided, the watermark will be added to the generated video.
Enter a task ID to get the video version of your video.
Task ID from a completed video generation task
Enter a task ID to get the video version of your video.
Task ID from a completed video generation task
Enter a task ID to get the video version of your video.
Complete guide to using veo-3-1
Google Veo 3.1 API
Create high-quality videos from text or images with Google Veo 3.1 API on Uptech API. Control every frame, extend scenes, and generate synchronized audio — try Veo 3.1 today and experience cinematic AI video generation.
Available Models of Veo 3.1 API on Uptech API
Veo 3.1 Fast
Veo 3.1 Fast focuses on speed and lower cost. It’s ideal for fast video generation, social media content, and ad creatives where quick turnaround matters. Use it on Uptech API to test ideas and iterate rapidly.
Veo 3.1 Quality
Veo 3.1 Quality delivers richer detail, smoother motion, and accurate lighting. It’s suited for projects that demand cinematic precision, professional visuals, and consistent high-quality output on Uptech API.
New Capabilities of Google Veo 3.1 API
Start & End Frame Control in Veo 3.1 API
You can define exactly how your AI video begins and ends. On Uptech API, the Veo 3.1 API lets you control both the first and last frame, creating smooth, cinematic transitions. This gives your clips a clear rhythm and helps every sequence feel intentional and complete.
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Multi-Image Reference with Veo AI 3.1
Use multiple images to guide your video’s visual direction. With the Veo 3.1 API on Uptech API, you can provide different reference images to shape your character design, lighting style, or color tone, ensuring your generated video stays visually consistent across every shot.
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Native Audio and Richer Sound in Veo 3.1 API
Veo 3.1 adds native audio to your creations — including dialogue, ambient sound, and effects that match every movement. When you generate videos through Uptech API’s Veo 3.1 API, sound and visuals stay perfectly aligned, making scenes feel more immersive and believable.
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Extend Your Clips Beyond 8 Seconds with Gemini Veo 3.1
If you want your clip to continue naturally, you can extend it without losing coherence. The “Extend” feature in Veo 3.1 API allows you to go beyond 8 seconds, carrying forward both motion and narrative to create longer, more dynamic video sequences.
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Consistent Characters Across Scenes in Veo 3.1 AI Video Generator
Upload reference images of your character, and Uptech API’s Veo 3.1 API will maintain the subject’s identity, appearance, and motion across every frame. This ensures your character stays visually consistent throughout multiple scenes, creating a cohesive and professional-looking video narrative.
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Veo 3.1 vs Veo 3 vs Sora 2
Veo 3
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Veo 3.1
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Sora 2
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How to Try Google Veo 3.1 API on Uptech API
Step 1: Create Your Video Prompt with Veo 3.1 API
Step 2: Customize Video and Audio Settings in Uptech API
Step 3: Generate and Download with Veo 3.1 AI Video Generator
Why Use Uptech API for Veo 3.1 API Access
Free Veo 3.1 API Online Testing on Uptech API
Generate your first AI video using Veo 3.1 API for free on Uptech API. No installation or setup is needed — simply open the playground, enter your text or image prompt, and see instant results directly in your browser.
Affordable Google Veo 3.1 API Pricing
Uptech API provides access to Google Veo 3.1 API at a more affordable rate. You can create high-quality videos with native audio while saving on costs, making it the best choice for developers, creators, and startups building AI video tools.
All AI Video and Image APIs in One Platform
Uptech API unifies top AI APIs — including Veo 3.1, Veo 3, Sora 2, and Wan 2.2 — in a single interface. You can explore, compare, and integrate different models without switching platforms, simplifying your entire creative workflow.