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AI video model comparison

Runway Gen-4.5 vs Seedance 2.5

Seedance 2.5 is 49% cheaper (cheapest second: Runway Gen-4.5 $0.31/s vs Seedance 2.5 $0.16/s). Runway Gen-4.5 has the cheapest clip and faster renders. Seedance 2.5 has longer clips, more reference images and native audio.

Head to head

2 of 4 models · prices from the live catalog,

Runway Gen-4.5RunwayhotTry it →
Seedance 2.5ByteDanceflagshipTry it →
Price
Cheapest second$0.31/s$0.16/s (best)
Per second at 480pNot offered$0.16/s
Per second at 720pNot offered$0.35/s
Per second at 1080pNot offered$0.86/s
Cheapest clip$0.61 (best)$0.64
A 5-second clip at 720pNot offered$1.75
A 10-second clip at 1080pNot offered$8.58
Speed and length
Render time~1–2 min (best)~3–8 min
Longest clip10s30s (best)
Clip lengths2–10s4–30s
Output
Top resolution—1080p
Frames1280:720 · 720:1280 · 1584:672 · 1104:832 · 832:1104 · 960:9609:16 · 16:9 · 1:1 · 4:3 · 3:4 · 21:9
Sound—Native (best)
Inputs
Takes1Text · 1 image30Text · 30 images · 1 video · audio
Reference imagesUp to 1Up to 30 (best)
NeedsA promptA prompt
What it does
Can doText → videoImage → videoText → videoImage → videoFirst + last frameMulti-referenceVideo → videoAudio-driven
Good forStudio workflows · VFX plates · Brand workCinematic scenes · Multi-reference · Product films
Settings you controlContent moderation · Length · Frame · SeedFrame · Draft preview · Draft to finalize · Length · Mode · Audio · Attachment role · Per-attachment roles · Negative prompt · File format · Resolution · Return last frame · Seed · Watermark

Same prompt, side by side

UGC selfie · the same prompt on every model

“A woman in her late twenties talks straight into her phone camera in a bright kitchen, handheld selfie framing, natural window light, she smiles and gestures mid-sentence, casual creator energy, no on-screen captions”

Runway Gen-4.5: not rendered yet

Same prompt
Seedance 2.5

Product shot · the same prompt on every model

“Cinematic product shot: a matte black wireless earbud case turns slowly on a dark reflective surface, a single warm rim light sweeps across it, macro lens, shallow depth of field, slow push-in, plain unbranded case”

Runway Gen-4.5: not rendered yet

Same prompt
Seedance 2.5

Which should you choose?

Choose Runway Gen-4.5 if you want

  • the cheapest clip
  • faster renders
  • studio workflows
  • VFX plates
Generate with Runway Gen-4.5 →

Choose Seedance 2.5 if you want

  • a lower price per second
  • longer clips
  • more reference images
  • native audio
  • first + last frame, which the other cannot do
  • multi-reference, which the other cannot do
  • video → video, which the other cannot do
  • audio-driven, which the other cannot do
  • cinematic scenes
Generate with Seedance 2.5 →

More from each model

Runway Gen-4.5

A cork pops from a bottle, foam rises and spills over the lip, high-speed look, studio black background
Slow dolly in on a woman standing at a rain-streaked window, her reflection sharpens as the camera closes, cool daylight, locked vertical framing
A man in a grey wool coat walks toward camera down a cobbled lane as the camera tracks backward, his face and coat hold steady the whole take, overcast light
Static wide of a night highway overpass, cars stream beneath as light trails with natural motion blur, city skyline behind
Handheld two-shot of a glassblower and an apprentice at a furnace, the camera steps around them as the molten glass glows, faces and aprons consistent through the move

Seedance 2.5

0–2s: close-up of a barista's hands tamping espresso, warm tungsten light. 2–4s: milk pours into the cup, a rosetta forms in slow motion. 4–5s: she slides the cup across the bar toward camera and smiles, shallow depth of field
Wide shot of a mountain lake at dawn, mist lifting off the water, a loon calls and the sound echoes, a fish breaks the surface with a soft splash, slow push-in, natural ambience on frame
0–2s: a skateboarder drops into an empty concrete bowl at golden hour, low handheld follow. 2–4s: the camera swings around as she carves the wall, sparks of dust in backlight. 4–6s: she pops out and lands a clean stop, dust settling, one continuous shot, no cuts

Compare with others

Runway Gen-4.5 vs …

Seedance 2.5 vs …

← All video models, compared

How we compare

  • Prices come from the live catalog at the pay-as-you-go rate. The quote before you generate is binding. Plans and packs
  • Render times are the catalog’s own estimate for one render.
  • Every clip and image on this page was rendered on OpenClips.

Questions

Runway Gen-4.5 vs Seedance 2.5: questions

Seedance 2.5 costs the least here (cheapest second). Runway Gen-4.5: $0.31/s. Seedance 2.5: $0.16/s. Prices are at the pay-as-you-go rate. The quote before you generate is binding.

Runway Gen-4.5 is the fastest here. Runway Gen-4.5 takes ~1–2 min. Seedance 2.5 takes ~3–8 min.

Runway Gen-4.5 and Seedance 2.5 take a still as the first frame or a reference.

Runway Gen-4.5 makes up to 10 seconds. Seedance 2.5 makes up to 30 seconds.

Seedance 2.5 renders native audio with the picture. Runway Gen-4.5: silent.