Veo3.1 Fast Extend Video API
Google's video generation model. Call it on 666 AI with the same API key as every other model. Pay as you go; prices follow the upstream in real time and this page updates hourly.
| Vendor | |
| Type | video generation |
| Price | $0.135 – $0.2025 per second |
| Model ID (use this in your request) | veo3.1/fast/extend-video |
How to call Veo3.1 Fast Extend Video
The API is OpenAI-compatible. Replace YOUR-ENDPOINT with the endpoint shown on your API Key page after you sign up, and YOUR-KEY with your key.
curl https://YOUR-ENDPOINT/v1/video/generations \
-H "Authorization: Bearer YOUR-KEY" \
-H "Content-Type: application/json" \
-d '{"model": "veo3.1/fast/extend-video", "prompt": "a red panda walking in the snow", "duration": 5}'Video is generated asynchronously: you get a task ID back and poll for the result (see the docs). You're billed for the seconds actually generated; failed jobs are free.
Similar models — price comparison
| Model | Price |
|---|---|
| Kling Video V2.6 Pro Image To Video | $0.0945 – $0.189 per second |
| Kling Video V2.6 Pro Text To Video | $0.0945 – $0.189 per second |
| Wan 2.7 T2v | $0.135 – $0.2025 per second |
| Veo 3.0 I2v Fast | $0.135 – $0.2025 per second |
| Veo3.1 Fast | $0.1485 – $0.2025 per second |
| Veo3.1 Fast Image To Video | $0.135 – $0.2025 per second |
More models from Google
| Model | Price |
|---|---|
| Gemini 3 Flash Preview | $0.6075 per 1M input tokens · $3.65 per 1M output tokens |
| Gemini 3 Pro Image Preview | $2.43 per 1M input tokens · $146 per 1M output tokens |
| Gemini 3.1 Flash Image Preview | $0.6075 per 1M input tokens · $72.9 per 1M output tokens |
| Gemini 3.1 Pro Preview | $2.43 per 1M input tokens · $14.58 per 1M output tokens |
| Gemini 3.5 Flash | $1.82 per 1M input tokens · $10.94 per 1M output tokens |
| Gemini 3.6 Flash | $0.9113 per 1M input tokens · $4.56 per 1M output tokens |
| Gemini 3.7 Flash | $0.9113 per 1M input tokens · $4.56 per 1M output tokens |
| Gemini 3.8 Flash | $0.9113 per 1M input tokens · $4.56 per 1M output tokens |
FAQ
How much does the Veo3.1 Fast Extend Video API cost?
On 666 AI, Veo3.1 Fast Extend Video costs $0.135 – $0.2025 per second. You pay only for what you use — no monthly fee. Prices follow the upstream in real time; this page updates every hour.
Can I use the official OpenAI SDK?
Yes. The API is OpenAI-compatible: in the OpenAI Python or Node.js SDK just change base_url and api_key, and set model to veo3.1/fast/extend-video.
How do I pay?
Bank card (including Google Pay / Apple Pay), USDT / ETH, or bank wire. Top up once and usage is deducted as you go.