MiniMax H3 LoRA API

Introduction

MiniMax H3 LoRA Text to video turns a written scene into a 3 to 15 second clip with a stereo soundtrack, and lets you load up to three of your own LoRA files on top of the open-weights MiniMax H3. Pick 480p, 540p, 768p or 1080p and one of seven aspect ratios.

Choose a mode by starting material

Key features

Your LoRAs, loaded per request

Each request takes up to three LoRA files as direct links, each with its own strength from 0 to 4. There is no upload step and no allow-list, so any H3 LoRA you can link to is usable. We checked that the weights really load: a VHS-tape style LoRA turned a clean hotel-room prompt into tracking noise, colour bleed and a faded 1980s palette.

Picture and sound together

Every clip comes back as a 24 fps MP4 with a stereo soundtrack generated in the same pass. Describe the sound on its own Audio: line, from rain on glass to a line of dialogue, and it arrives synced to the picture.

Request parameters

Pricing

Prices are in credits, the same credits you use on the website (1 credit = $0.01). The hold is taken when the task is accepted and settled to the actual charge when it finishes; failed tasks are refunded.

Each task is rounded up to whole credits, so one run at the lowest tier costs 38 credits for a 5-second clip ($0.38).

For an exact number before you run, send the same body to POST /jobs/quote.

Use cases

Style tests before a campaign

Run the same short prompt with three different style LoRAs at 480p for three seconds and compare them side by side.

Short scenes for companion and creator platforms

Load the anatomy or motion LoRA your audience expects, write the scene and the sound, and deliver at 768p or 1080p. There is no content flag to toggle and no second review after generation.

Retro and animated shorts

Film-stock, VHS and cartoon LoRAs change the medium, not just the grade. A 1939 hand-drawn cartoon LoRA and a VHS LoRA turn the same rooftop scene into two different productions.

Prompt guide & pro tips

Trigger first, then the shot, then the sound

Most community LoRAs expect a trigger word at the very start, such as vh5tape for the VHS LoRA. After it, write the shot as a short timeline and finish with an Audio: line. Restating what the LoRA already does usually fights it.

One scale change per run

With two or three LoRAs loaded, move one scale at a time and keep the seed fixed. Start style LoRAs at 1 and concept LoRAs at 0.6 to 0.8. If a clip looks overcooked, drop the strongest weight first.

API quick start

Call the MiniMax H3 LoRA API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow- and use the same credits as the website.
2. Send the request. POST /jobs/createTask with model minimax/h3-lora/text-to-video and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "minimax/h3-lora/text-to-video",
  "input": {
    "prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
    "aspect_ratio": "16:9",
    "resolution": "480p",
    "duration_seconds": 5
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

MiniMax H3 LoRA API questions

All MiniMax models

MiniMax H3 Singularity LoRA uses the same LoRAs on a fine-tune that keeps fast action and distant faces sharper, but renders more slowly and has no text to video.

• MiniMax H3 APIExpressive clips with audio, up to 2KFrom 28 credits for a 5-second clip
• MiniMax Speech 2.8 HD APIHigh-fidelity speech in 400+ voices with emotion controlFrom 18 credits per 1,000 characters
• MiniMax Music 3.0 APIFinished stereo songs, with vocals or instrumentalFrom 27 credits per run
• MiniMax H3 Singularity LoRA APICommunity-tuned H3 video that loads your own LoRAsFrom 45 credits for a 5-second clip
• MiniMax H3 Max APIFast clips with ambience, effects and musicFrom 38 credits for a 5-second clip
• MiniMax H3 LoRA APIMiniMax H3 video with sound and up to three of your LoRAsFrom 38 credits for a 5-second clip
• MiniMax H3 Image LoRA APIH3 stills and edits with up to three of your LoRAsFrom 7 credits per image
• MiniMax Speech 2.8 Turbo APIFast speech in 400+ voices with emotion controlFrom 11 credits per 1,000 characters

Other video APIs

• LTX-2.3 LoRA APILTX-2.3 clips with stereo sound and your own LoRAsFrom 18 credits for a 5-second clip
• LTX-2 19B LoRA APILTX-2 clips with sound and your own LoRA stylesFrom 14 credits for a 5-second clip
• Wan 2.2 LoRA APIWan 2.2 video with your LoRAs on either expert passFrom 18 credits for a 5-second clip
• Wan 2.2 5B LoRA APILight 720p Wan 2.2 clips that load your own LoRAsFrom 18 credits per run
• Wan 2.1 LoRA APIWan 2.1 video and edits with your own LoRAs, camera moves includedFrom 36 credits per run

More about MiniMax H3 LoRA

Try it

MiniMax H3 LoRA AI Video Generator onlineCreate videos with MiniMax H3 LoRA in PopNow

Docs

MiniMax H3 LoRA model ID and input schema in the API docsPopNow API quickstart: your first request in five minutesImage to video guide for the PopNow APIWebhooks: get MiniMax H3 LoRA results without polling