Wan 2.7 Video Extend

Name: Wan 2.7 Video Extend
Author: Alibaba

alibaba/wan/2.7/video-extend

Alibaba Wan 2.7 Video Extend continues an input clip from a text instruction, optionally ending on a chosen last frame, for a total length of up to 15 seconds.

Use in agent Get API key

Base price: $0.50USD / run
Execution: async
Model type: video
Input fields: 6

Try the model

Playground

Open playground

Input

Prompt(string)

What happens after the source clip ends: action, camera movement, scene progression, and sound. Up to 5,000 characters.

Video(string)

URL of the source clip to continue (MP4 or MOV, 2-10 seconds, 240-4096px per side, up to 100MB).

End Image(string)

Upload

PNG, JPEG, WebP, or GIF · 20 MiB maximum

Optional last frame the continuation should end on (JPEG, PNG, BMP, or WebP; 240-8000px per side, up to 20MB).

Duration(integer)

Total length of the output in seconds, including the source clip (2-15). For a 3-second source and duration 10, the model adds 7 seconds. Must be longer than the source clip. Allowed values: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.

Resolution(string)

The resolution of the video to generate. Allowed values: 720p, 1080p.

Seed(integer)

Random seed (0-2147483647) for reproducible results. Omit for a random seed. Range: 0 to 2147483647.

OutputReady

Your output will appear here

Complete the inputs, then click Run.

Specifications

Pricing

Base price: $0.50 / run
Billing formula: (params.duration ?? 5) * ((params.resolution ?? "720p") == '1080p' ? 0.15 : 0.10)

Context & modalities

Input: Schema-defined
Output: video

Capabilities

Chat: Not supported
Vision: Not supported
Reasoning: Not supported
Structured output: Not supported
Function calling: Not supported
Audio input: Not supported

Access

Provider: Alibaba
Model ID: alibaba/wan/2.7/video-extend
Execution: async
API: Unified Run API
Endpoint: /v1/run

API README

Wan 2.7 Video Extend

Continue a short clip past its last frame. Wan 2.7 keeps the subject, look, and camera language of the source and generates what you describe next; add a last frame to steer where the shot ends. The result is one video that contains the source clip followed by the continuation.

Fields

Field	Type	Default	Notes
`prompt`	string, required	—	What happens next. Up to 5,000 characters.
`video`	video URL, required	—	Source clip. MP4/MOV, 2–10s, 240–4096px per side, ≤100MB.
`end_image`	image URL	—	Optional last frame for the continuation.
`duration`	2–15	5	Total output length including the source clip. Must be longer than the source.
`resolution`	`720p` / `1080p`	`720p`	Output tier; the aspect ratio follows the source clip.
`seed`	integer 0–2147483647	random	Fix it to compare prompt changes.

Billing

Billed on the total output length (duration), which includes the source clip: $0.10 per second at 720p and $0.15 at 1080p. A 3-second source with duration: 10 returns 10 seconds of video (3 source + 7 new) and bills 10 seconds.

Total output	720p	1080p
5s	$0.50	$0.75
10s	$1.00	$1.50
15s	$1.50	$2.25

Failed runs are not charged. Output files are copied to SandBase storage and the returned URL stays valid for 7 days; download anything you need to keep.

Prompting

Describe the next beat rather than the source: “she picks up her backpack and walks out of frame”.
Mention the subject and direction of movement again when continuity matters.
Use end_image to land on a specific final composition.

Limits

The source clip must be 2–10 seconds; duration caps the whole output at 15 seconds.
Audio cannot be supplied for continuation; use image-to-video for audio-driven generation.
To change existing footage instead of continuing it, use alibaba/wan/2.7/video-edit.

Also on SandBase

Other Wan 2.7 endpoints: alibaba/wan/2.7/text-to-video, alibaba/wan/2.7/image-to-video, alibaba/wan/2.7/reference-to-video, alibaba/wan/2.7/video-edit. Newer: alibaba/wan/3.0/video-extend.

Start building

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

Production API

Unified Run API endpoint

https://api.sandbase.ai/v1/run

Model ID

alibaba/wan/2.7/video-extend

# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/run" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "alibaba/wan/2.7/video-extend",
  "video": "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20260129/hfugmr/wan-r2v-role1.mp4",
  "prompt": "A girl takes a selfie in the mirror, then picks up her backpack and walks out of the room.",
  "duration": 5,
  "resolution": "720p"
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
  status=$(printf '%s' "$result" | jq -r .status)
  case "$status" in completed|failed|timeout) break ;; esac
  sleep 2
  result=$(curl --fail-with-body --silent \
    -H "Authorization: Bearer $SANDBASE_API_KEY" \
    "https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"

Choose your model

Compare models

All image & video models

Model	Type	Default price	Released
Wan 2.7 Video ExtendThis model `Alibaba`	Video	$0.50 / run	Oct 5, 2026
Wan 2.7 Video Edit `Alibaba`	Video	—	Oct 5, 2026
Wan 3.0 Prime Video Edit `Alibaba`	Video	—	Oct 4, 2026
Wan 3.0 Prime Video Extend `Alibaba`	Video	—	Oct 4, 2026
Wan 3.0 Video Edit `Alibaba`	Video	—	Oct 4, 2026
Wan 3.0 Video Extend `Alibaba`	Video	—	Oct 4, 2026