Pika launches H3 Flex, an open-weight AI video generator

Pika launched H3 Flex on October 29 as an open-weight video-and-audio release built on MiniMax H3. Pika says it can produce a 15-second clip with a soundtrack in as little as seven seconds and debuted at No. 1 on DesignArena’s open-weight text-to-video board. Its released adapters support local output at 480p or 768p; 4K output and separate audio stems are hosted API features.