How much does the ai video extender cost?

A flat 143 credits per extension, no matter your source length. You'll see that exact quote, valid for 5 minutes, before you confirm and any credits are charged.

How long is the final video?

Your source (2–15 seconds) plus a 6-second AI continuation, delivered as one MP4 with a generated audio track. A Sept 27, 2026 test took a 5.04-second clip to 11.04 seconds.

Is this the official xAI extension tool?

No. Cicadas is an independent site and is not affiliated with, endorsed by or operated by xAI. It calls the Grok Imagine Extend model through a third-party API (fal) and returns results only inside your Cicadas account.

Will the seam always look perfect?

Not guaranteed. Our Sept 27, 2026 test kept the scene, moon and light consistent across a desert shot's seam, but join quality depends on your specific source. Review the result before publishing — a confirmed provider or output-validation failure refunds your credits automatically.

Grok Imagine Extend · 1 recorded exampleNew

AI Video Extender

This ai video extender runs the Grok Imagine Extend model through fal. Cicadas is an independent site, not affiliated with or endorsed by xAI. Upload a 2–15 second MP4 (H.264, H.265 or AV1), up to 80 MB, and describe what happens next. The output is one MP4: your source plus a 6-second AI continuation with its own generated audio track, for a flat 143 credits. Sign in and upload your clip; the server shows that exact quote, valid for 5 minutes, and only charges once you confirm. Results are private MP4s listed under Recent jobs (latest 20); a provider or output-validation failure refunds automatically, and you can leave and recover the job after signing in again. A Sept 27, 2026 test extended a 5.04-second desert shot to 11.04 seconds at 1280×720, keeping the scene, moon and light consistent across the seam — but seam quality depends on your source, so review it before publishing. You must have the rights to any video you upload.

Updated Sep 9, 2026

Continue your video

Choose a 2–15 second MP4, up to 80 MB. Preview stays in your browser until you explicitly upload for a quote. The server checks the actual H.264, H.265 or AV1 video before charging.

Source video

Describe what happens next

Video extension is not enabled in this environment. Preview and prompt preparation remain available; no upload or charge.

Your prompt draft can resume after sign-in in this tab. For privacy, choose the source file again after returning.

Grok Imagine Extend adds six seconds to a 2-15 second MP4. Output is the source plus continuation. Seam quality and sound preservation await real acceptance.

Continuation prompt

These are untested prompt starters. Up to 2,000 characters / 4,000 UTF-8 bytes.

Added durationI have permission to upload and extend this video.

Workflow and limitations

Continue any 2–15 second MP4

Upload an H.264, H.265 or AV1 MP4 up to 80 MB and 2–15 seconds, then describe what happens next. Grok Imagine Extend appends a 6-second AI continuation with its own generated audio track — the file you download is source plus continuation in one MP4.

One flat price, quoted before you confirm

Every extension costs a flat 143 credits, regardless of source length. The server shows the exact quote, valid for 5 minutes, and only charges once you confirm.

Evidence: one seam held up, but check every source

A Sept 27, 2026 test extended a 5.04-second desert shot to 11.04 seconds at 1280×720; the scene, moon and light stayed consistent across the seam. Seam quality depends heavily on your source clip — review the join before you publish.

How to use it

01
Sign in and upload a 2–15 second MP4 (H.264, H.265 or AV1), up to 80 MB.
02
Describe what happens next, then review the flat 143-credit quote — valid for 5 minutes — and confirm.
03
Download the extended MP4 and check the seam, then reopen it later from Recent jobs if you need it again.

Prompt ideas

Untested prompt drafts. For recorded outputs, use the playable examples and testing record.

“The camera holds steady as the walker keeps moving forward, dust continuing to drift in the same direction.”
“The train keeps pulling away at the same speed, its lights fading further down the track.”
“The tide keeps rolling in at the same pace, the same gull still circling overhead.”

FAQ

Evidence, sources and testing scope

Local preview, six-second continuation quoting, task recovery and private MP4 delivery are implemented. The local repeated-frame fixture verifies task handling, not AI continuation. Real transition quality, audio behavior and hosted paid delivery remain unaccepted.

Cicadas.ai testing record · Reviewed 2026-09-21

See samples, methods, costs and limitations