Seedance 2.0 vs HappyHorse 1.1

Pick Seedance 2.0 when…

• The clip is a final deliverable and 40 extra credits per render is not the constraint
• You have settled on the shot and are rendering the version that ships
• The clip ships as-is and needs its own synchronized sound
• The brief leans on native audio

Trade-off: You pay 40 more credits on every generation; You wait 25s longer per clip; You are capped at 12s per clip and will need extension or a cut for anything longer.

Pick HappyHorse 1.1 when…

• You are generating in volume and the 40-credit difference per clip adds up fast
• You are still exploring and need a tight generate-judge-regenerate loop (~55s / 5s clip versus ~80s / 5s clip)
• The shot cannot be cut — you need up to 15 seconds in one generation rather than 12
• You are scoring the piece properly and would discard generated audio anyway
• The brief leans on dynamic motion

Trade-off: You will handle audio in post.

Vendor angle

These come from different vendors — ByteDance and Alibaba — which is where the interesting differences live. Vendors train on different data and optimise for different failure modes, so the same prompt can produce recognisably different motion, grain and lighting. On FlowAIVideo both sit behind one account and one balance, so you never have to pick a vendor before you have seen the output.

What it costs to decide

Running one clip on each costs 104 credits in total (72 + 32). A new account starts with 40 free credits, which covers HappyHorse 1.1 plus part of the other — enough to run a real comparison rather than reading about one. Paid plans start at 600 credits per month, and there is no per-model subscription: one balance, 22 models.