Pika H3 Flex: A Guide to Video, Audio and Four Creation Modes

Pika H3 Flex is a video model for creating moving scenes with a soundtrack. H3 Flex brings it into an independent browser-based studio: you choose an input, describe the scene and review the result. This guide explains the choices available in this service, rather than claiming that every option in the wider Pika API is exposed here.

Choose the input you already have

Text to Video

Start with a written idea when no photograph needs to anchor the shot. The text-to-video studio accepts a scene description and lets you choose duration, resolution and aspect ratio. Use this workflow for exploring a location, a small visual joke or a product concept that has not yet been photographed.

Image to Video

Use the image-to-video studio when a particular composition should set the starting point. A first frame establishes the scene; an optional last frame can guide the ending. The prompt should explain motion, camera behaviour and sound, rather than simply list the objects already visible.

Reference to Video

Reference to Video guides a new scene with images. In H3 Flex, references are currently image inputs; video and audio references are not accepted. A reference is guidance, not a guarantee of exact reproduction, identity consistency or ownership of the output. Choose material you are allowed to use.

Draft to Video

Draft to Video finishes an existing take. In this service you select one of your own completed native-resolution drafts from My Films, then choose a larger output. It is not a general upload-and-upscale tool for any video on your device.

Start small and review deliberately

H3 Flex currently offers clips from 5 to 15 seconds. Before generating, decide what a successful take would show: a single visible action, an intentional camera move and a sound direction. Short tests make it easier to compare those choices. Changing several instructions at once makes it harder to identify why a new take improved.

Watch the entire clip before accepting it. Check whether the motion reads clearly, whether the end frame is useful and whether the audio fits the shot. A larger output does not automatically repair an awkward action or an unclear narrative.

Understand native size and final delivery

The model offers native 480p and 768p outputs; higher-resolution delivery uses upscaling. H3 Flex exposes 1080p, 2K and 4K as larger output choices. Select the size required by your publishing workflow. For an idea that may change, a native draft is a practical first step; for a take you intend to keep, read the draft-upscaling guide.

Separate model capability from service pricing

Pika API charges and H3 Flex retail credits are different systems. The H3 Flex pricing page describes this service's plans. The generator shows the credit cost before submission, based on your selected settings. There is no promise of unlimited generation or a free allowance on this page.

H3 Flex is not the official Pika website. Model information can be checked in the official Pika model directory. To build your first scene, continue with the prompt guide.