How long can a Seedance 1.5 Pro video be?

5 to 10 seconds per request, in 5-second steps.

Does Seedance 1.5 Pro support 4K?

No. Seedance 1.5 Pro tops out at 1080p. For 4K, use Seedance 2.0 4K or Seedance 2.5 on the Pro plan.

How much does a 10-second Seedance 1.5 Pro video cost?

1,069 credits at 1080p, standard tier — about $10.69. The studio shows the exact figure before you generate and asks you to confirm anything over 800 credits.

Which plan includes Seedance 1.5 Pro?

The Starter plan and above. There is no free tier — every generation costs real GPU time, so access starts with a paid plan or a credit pack.

How many reference inputs does Seedance 1.5 Pro accept?

Up to 4 in total: 4 images, 0 videos of at most 0s each, and 0 audio clips.

Seedance 1.5 Pro

Budget tier and free trials.

What is Seedance 1.5 Pro?

Seedance 1.5 Pro generates 5–10 second video at up to 1080p, with 4 image and 0 video references per request. It is available on the Starter plan and above, and through the API at /api/v1/generations. Typical wall-clock is 45s (p50) and 110s (p95).

Capabilities

CapabilityByteDance’s claimOur measurement

Duration5–10s in 5s stepsconfirmed

Resolutions480p, 720p, 1080pconfirmed

Aspect ratios16:9, 9:16, 1:1confirmed

Native audioNoconfirmed

Total references4confirmed

Image references4confirmed

Video references0 (≤0s each)confirmed

Audio references0confirmed

End frameNoconfirmed

Return last frameNoconfirmed

Video extensionNoconfirmed

Region-level editingNoconfirmed

R2V controlNoconfirmed

3D camera blockoutNoconfirmed

Multilingual dialogueNoconfirmed

A row reads “not verified yet” when the figure comes from ByteDance’s announcement and we have not confirmed it against the provider API ourselves. We would rather show the gap than restate a keynote.

What it costs

Credit cost at 1080p, standard tier. Derived from published vendor rates pending our own benchmark run.

00:00:05:001080p16:9standard537cr≈ $5.37

00:00:08:001080p16:9standard856cr≈ $8.56

00:00:10:001080p16:9standard1,069cr≈ $10.69

Call it from the API

curl https://sedance.app/api/v1/generations \
  -H "Authorization: Bearer $SEDANCE_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-1.5-pro",
    "prompt": "A slow dolly-in across a rain-soaked rooftop at dusk",
    "resolution": "1080p",
    "duration_sec": 10,
    "aspect_ratio": "16:9",
    "confirm_cost": true
  }'

Returns 202 with the job id and the credits held. Poll /api/v1/generations/:id — the poll cadence for a 10s job should start at 3s.

Questions

How long can a Seedance 1.5 Pro video be?: 5 to 10 seconds per request, in 5-second steps.
Does Seedance 1.5 Pro support 4K?: No. Seedance 1.5 Pro tops out at 1080p. For 4K, use Seedance 2.0 4K or Seedance 2.5 on the Pro plan.
How much does a 10-second Seedance 1.5 Pro video cost?: 1,069 credits at 1080p, standard tier — about $10.69. The studio shows the exact figure before you generate and asks you to confirm anything over 800 credits.
Which plan includes Seedance 1.5 Pro?: The Starter plan and above. There is no free tier — every generation costs real GPU time, so access starts with a paid plan or a credit pack.
How many reference inputs does Seedance 1.5 Pro accept?: Up to 4 in total: 4 images, 0 videos of at most 0s each, and 0 audio clips.

Seedance 2.5 — 30 seconds in a single pass — no stitching, no seam to hide.
Seedance 2.0 4K — High-resolution finals at up to 15 seconds.
Seedance 2.0 — The workhorse: native audio, 9 image / 3 video / 3 audio references.
Seedance 2.0 Fast — Draft here first. Iterate cheap, then commit to length.
Seedance 2.0 Mini — The cheapest 2.x route. Free-tier and drafting.