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minimax/h3-max/director

Direct continuous, realtime video streams with live prompts while preserving characters, settings, and story continuity.
Learn more about H3
Inference
Commercial use
SchemaAsyncAPI
LLMs
PlaygroundAPI

Input

Start with an example

Configure the session before connecting.

One-shot exact final frame for the first chunk. Director jointly plans that arrival and the following checkpoint continuation.

Optional upfront script: beats at whole-second offsets from the first generated video. `prompt` stays the series premise; a beat prompt directs from its offset on. Cannot be combined with `end_image_url` or `audio_url` (place them in the script).

URL of the image to use as the exact first frame. The opening prompt expansion also sees this image, so the first segment's prompt is grounded in it.

Optional startup soundtrack. The stream's audio is pinned to this recording from the first chunk as FL2VA target audio, not a Ref2VA reference: every chunk is conditioned on the next window of it (plus the regenerated seam) until it ends, and the source PCM itself is what plays. Live `prompt` messages can replace or queue more audio at any time.

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Result

Idle

Sessions cost $0.02 per second of video generated.

The promotional price expires on Sep 14th, with list price being $0.08 per second of video. 1080p costs 2× the standard rate. Default session length is up to 15 minutes.

Minimum charge per session: $1.20.