Modes and model IDs
| Mode | Model ID | Inputs & key parameters |
|---|---|---|
| Text-to-video | seedance-2.5-t2v-uncensored | prompt; 480p/720p, 4–30 s or -1 auto, ratio adaptive · 16:9 · 4:3 · 1:1 · 3:4 · 9:16 · 21:9 |
| Image-to-video · first frame | seedance-2.5-firstframe-uncensored | 1 image + prompt |
| Image-to-video · first + last frame | seedance-2.5-firstlast-uncensored | 2 images + prompt |
| Omni-reference | seedance-2.5-reference-uncensored | up to 30 images, 10 videos, 10 audio clips (≤30 s of video and of audio in total) |
| Video edit | seedance-2.5-edit-uncensored | 1–10 clips (4–30 s each) + prompt; inputs must not contain real people |
| Video extend | seedance-2.5-extend-uncensored | 1–10 clips extended in sequence + prompt; inputs must not contain real people |
Every mode uses the same request shape: model + prompt + media arrays (images / videos / audios / files as public HTTPS URLs) + params. Full field tables: API docs.
Prices (USD, base list)
| Model | Variant | Price |
|---|---|---|
seedance-2.5-edit-uncensored | 480p | $0.55300/video (from) |
seedance-2.5-edit-uncensored | 720p | $1.24/video (from) |
seedance-2.5-extend-uncensored | 480p | $0.55300/video (from) |
seedance-2.5-extend-uncensored | 720p | $1.24/video (from) |
seedance-2.5-firstframe-uncensored | 480p | $0.10300/s |
seedance-2.5-firstframe-uncensored | 720p | $0.23100/s |
seedance-2.5-firstlast-uncensored | 480p | $0.10300/s |
seedance-2.5-firstlast-uncensored | 720p | $0.23100/s |
seedance-2.5-reference-uncensored | 480p · image/audio references only | $0.10300/s |
seedance-2.5-reference-uncensored | 720p · image/audio references only | $0.23100/s |
seedance-2.5-reference-uncensored | 480p · with video reference | $0.55300/video (from) |
seedance-2.5-reference-uncensored | 720p · with video reference | $1.24/video (from) |
seedance-2.5-t2v-uncensored | 480p | $0.10300/s |
seedance-2.5-t2v-uncensored | 720p | $0.23100/s |
Base list prices from the live price list (/pricing · pricing.json); the effective price for your key is returned by GET /ent/v2/prices. Cost is reserved at submit and settled on completion — failed tasks are refunded in full.
Example request
POST https://api.18models.ai/ent/v2/generate
Authorization: Bearer sk-…
Content-Type: application/json
Idempotency-Key: <stable-request-id>
{
"model": "seedance-2.5-t2v-uncensored",
"prompt": "Handheld shot, a couple dancing close in a dim kitchen, soft focus, film grain",
"params": { "resolution": "720p", "ratio": "16:9", "duration": 6 }
}
The response is HTTP 202 with a task_id; poll GET https://api.18models.ai/ent/v2/tasks/{task_id} (back off 2 s → 5 s) until status is success or failed, then read result_urls. Ready-made client code: docs → Build with AI or the Agent Skill.
What is allowed
NSFW output is permitted under the 18models Content Policy: fictional adult content, including explicit sexual content, is allowed; content involving minors (in any style) or real, identifiable people is prohibited absolutely and screened on both input and output. Upstream providers apply their own checks in addition to ours — a task rejected upstream fails and is refunded automatically.
- Token settlement: the per-second price shown at submit is an estimate; the task settles on the provider's completion_tokens ($10.70/M without video input, $6.40/M with) and any reservation difference is refunded.
- Provider input check: video edit / extend inputs that appear to contain a real person are rejected at submission (InputVideoSensitiveContentDetected.PrivacyInformation) and refunded. Images for first-frame / first-last / reference modes are not subject to that check.
- Fictional adults only under the 18models Content Policy; the upstream model applies its own output checks in addition to ours.
FAQ
How is Seedance 2.5 billed on 18models?
By output tokens: $10.70 per million tokens without video input, $6.40 per million with video input. The per-second price shown at submit is an estimate; the task settles on the provider's reported completion_tokens and any difference is refunded.
Does Seedance 2.5 on 18models allow NSFW content?
Fictional adult content is permitted under the 18models Content Policy. Note the provider's own input check: video edit and extend inputs must not contain a real person, or the task fails at submission and is refunded.
Is 18models cheaper than Segmind for Seedance 2.5?
As of 2026-08-19, 18models lists $10.70 per million output tokens versus Segmind's $10.97 — about 2.5% lower — for the same model.
What resolutions and durations does Seedance 2.5 support?
480p and 720p; 4–30 seconds, or -1 to let the model choose the duration. Omni-reference accepts up to 30 images, 10 videos and 10 audio clips per request.
Related
- 18models vs Segmind (Seedance pricing)
- Wan 2.7 video
- All models & prices
- Pricing
- API docs
- Content Policy