Pika H3 Flex

Animate a first frame, last frame or both into a video with synchronized audio. Choose any whole-second duration from 5 to 15, 480p or 768p resolution, and one of 11 aspect ratios. Optionally rewrite the prompt using the images. 1080p/2k/4k generates at 768p and upscales once with Pika Upsampler V1, preserving audio and frame rate. Combined pricing is per actual output second; the quote reserves the native frame-count duration bound.