Production notes from building a consistent-character AI video tool: what actually keeps a character on-model, and what AI video really costs when you do the arithmetic.
Text prompts describe a type of person — and the model re-rolls the details every clip. Consistency comes from stronger anchors: one good reference image, scene openers locked to it, last-frame chaining for continuations, and a draft-to-final workflow.
Per second, per credit, per subscription tier — AI video prices are quoted in whatever unit makes them look smallest. We converted the published API prices of the major models into one honest unit: a 10-second clip with audio, and the retail price that cost can actually sustain.
Free while you read: our frame grid overlay tool — compose shots consistently, right in your browser.