Guides, deep dives, and insights on AI video generation.
Pixverse C1 has no negative prompt, no style presets, no thinking mode. What it has is an action-trained backbone that reads physical motion better than almost anything at $0.03-$0.12/sec (tiered).
LTX 2.3 generates up to 2160p (4K) with synchronized audio in a single pass, at $0.08/sec - a fifth the cost of Veo 3.1's 4K tier.
LTX 2.3 is one of the few models that renders natively at 2160p and generates synchronized audio in the same pass. Prompts that get away with being loose at 720p fall apart when the detail ceiling rises.
Continuity in AI video comes from enforced parameter locks and identity strings, not intuition. Here are the rules in the order you apply them, with the assertion code to enforce each one.
Only specific endpoints accept end_image_url, and it lives on the image-to-video variants. Kling uses start_image_url instead. Here's what each model actually does with the anchor.
If every clip is 6 seconds you've given your editor a slide show. Map durations against the narrative arc before the first API call, here's how to do it per-model.