Providers and ModelsMiniMax

MiniMax H3

MiniMax H3
MiniMax · Video Generation
POST /v1/videos/generations

Generates 4 to 15 second clips at up to 2K with native stereo audio, following text, image, video, and audio references in one request.

At a glance

FieldValue
Model idminimax-h3
Model release date2026-07-31
Input modalitiesText, Image, Video, Audio
Output modalitiesVideo
Context window-
Weight precision-
RegionSingapore
Featuresvideo_generation, image_to_video, audio_out, audio_in, multimodal
Native inferenceNo
NewYes
Supported endpointsPOST /v1/videos/generations
Alternate model idsminimax/minimax-h3, hailuo-3, minimax/hailuo-3

Pricing

ChargeSpecRate
768pper second$0.18
2Kper second$0.26
2K regenerationper second$0.10
Reference image inputper input image after the first 5$0.08
Prompt expansion inputper 1M prompt tokens$1.80
Prompt expansion outputper 1M generated tokens$7.20

Example request

$curl https://api.empiriolabs.ai/v1/videos/generations \
>  -H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \
>  -H 'Content-Type: application/json' \
>  -d '{"model": "minimax-h3", "prompt": "sunrise over the ocean", "duration": 6}'

Parameters

ParameterTypeRequiredDefaultDescription
promptstringyes-Scene description, up to 7000 characters. Can describe action, camera work, dialogue, sound effects, and on-screen text.
modeenumno"auto"auto: detect from the inputs. t2v: text-to-video. i2v: animate one image as the opening frame. flf: transition from a first frame to a last frame. r2v: reference-to-video from images, videos, and audio. regenerate: re-render a 768p clip from this model at 2K. · Allowed: auto, t2v, i2v, flf, r2v, regenerate
resolutionenumno"768p"Output resolution. 2K is billed at a higher per-second rate than 768p. · Allowed: 768p, 2k
aspect_ratioenumno"adaptive"Output aspect ratio. Adaptive follows the supplied input media. · Allowed: adaptive, 21:9, 16:9, 4:3, 1:1, 3:4, 9:16
durationnumberno6Clip length in seconds, whole numbers only. · Range: 4 – 15
imagestringno-Image URL. One opening frame for image-to-video, or up to 9 reference images for reference-to-video.
last_framestringno-Closing frame image URL. Supplying it selects first and last frame mode.
videostringno-Reference video URL, up to 3 clips of 2 to 15 seconds each. Reference video is billed for its own duration in addition to the generated clip.
audiostringno-Reference audio URL, up to 3 clips of 2 to 15 seconds each. Requires an accompanying reference image or video.
base_videostringno-A 768p clip previously generated by this model, to re-render at 2K. Supplying it selects regeneration, which is billed at its own lower per-second rate on the source clip and the output.
watermarkbooleannofalseAdd the AI-generated content watermark to the output.
enhance_promptbooleannofalseExpand your brief into a full prompt before rendering, adding shot structure, camera work and a soundscape. Any reference media you attach informs the expansion. Adds a per-token charge on top of the per-second video cost.

Notes

MiniMax H3 generates 4 to 15 second clips at 24 fps in 768p or 2K, each with a native stereo audio track.

Modes

  • Text to video: prompt only.
  • Image to video: one image becomes the opening frame.
  • First and last frame: supply an opening and a closing image.
  • Reference to video: up to 9 images, 3 videos and 3 audio clips, 12 reference files in total.
  • Regeneration: re-render a 768p clip you generated earlier at 2K. Send the original prompt plus the source clip as base_video.

Prompt expansion

Set enhance_prompt to true and the model first rewrites your brief into a full prompt, adding shot-by-shot structure, camera moves, lighting and a soundscape, then renders from that. Any reference media you attach informs the expansion. It adds a per-token charge on top of the per-second video cost, and is skipped for regeneration because that path reproduces the original request.

Reference media

  • Images 256 to 5760 px per side, aspect ratio between 0.4 and 2.5, up to 30 MB each.
  • Videos 2 to 15 seconds, H.264 or H.265, up to 50 MB each.
  • Audio 2 to 15 seconds, WAV or MP3, up to 15 MB each. Reference audio requires an accompanying image or video reference.
  • Reference video and audio apply to reference-to-video only.
  • Prompts can be up to 7000 characters and may describe dialogue, sound effects, on-screen text, and camera work.

Billing

  • Billed per second of the generated clip at the resolution you request.
  • A reference video is billed for its own duration in addition to the generated clip, so a 5 second reference used to make a 6 second clip bills 11 seconds.
  • Regeneration is billed at its own lower per-second rate, on the source clip duration plus the regenerated output. Reference images carried over from the original request are not charged again.
  • The first 5 reference images are included. Each additional reference image is charged separately.
  • Prompt expansion, when enabled, is billed per token.

Machine-readable schema: GET https://api.empiriolabs.ai/v1/models/minimax-h3.