Pika H3 Flex is a video generation model post-trained on MiniMax H3, with open weights. Per Pika, it runs 1.8x faster than H3Max, makes a 15 second clip in as little as 7 seconds, and costs up to 80% less. It handles text, image and reference-to-video plus editing, with up to 12 references, native stereo audio and exportable stems. Draft at 768p, upscale to 4K. Use it via the Pika API or Hugging Face.