ComfyUI Node
arkennemasis fal · MiniMax H3 Text to Video · $0.05-0.16/s
MiniMax H3 is a frontier video model. This endpoint generates video from a text prompt alone, rendering at 2K in durations from 5 to 15 seconds across seven aspect ratios. Pricing (from fal, 2026-09-30): Video costs $0.05 per second at 480p, $0.06 per second at 768p, $0.13 per second at 2K and $0.16 per second at 4K. Model page: https://fal.ai/models/minimax/h3/text-to-video Key: FAL_KEY in the .env next to run_nvidia_gpu.bat. Results are saved in output/fal/minimax_h3_text-to-video/.
arkennemasis fal · MiniMax H3 Text to Video · $0.05-0.16/s
- target_audio
- video
- video_path
- expanded_prompt
- info
◄prompt►
◄duration5►
◄resolution2K►
◄seed-1►
◄enable_safety_checkertrue►
◄prompt_expansion_modebalanced►
◄aspect_ratio16:9►
◄max_cost_usd20.0►
◄reuse_identical_runtrue►
◄extra_json►
◄max_concurrent1►
Categoryarkennemasis/fal/Video/MiniMax
Inputs (12)
| Name | Type | Default | Description |
|---|---|---|---|
| prompt | STRING | Text prompt for video generation | |
| duration | INT | 55–15 | The duration of the video in seconds. |
| resolution | COMBO | 2K | The resolution of the generated video. 480P and 768P are native generation modes; 2K and 4K upscale a 768P base result. |
| seed | INT | -1-1–2147483647 | Random seed. A random seed is selected when omitted. -1 leaves it to the model. |
| enable_safety_checker | BOOLEAN | true | If set to true, the safety checker will be enabled. |
| prompt_expansion_mode | STRING | balanced | How much effort to spend rewriting the prompt before generation. 'disabled' skips prompt expansion. 'fast' returns in about a second. 'balanced' picks per request. 'quality' spends up to ~30s on a richer prompt. Empty leaves it out. |
| aspect_ratio | COMBO | 16:9 | The aspect ratio of the generated video. |
| target_audioopt | AUDIO | Optional URL of an audio clip at least 2 seconds long (maximum 15 MB) to pin to the generated soundtrack. Longer clips are trimmed to the requested video duration, keeping the beginning. The original audio replaces the output soundtrack, padded with silence if shorter than the video, without changing playback speed. Exceptionally high sample rates may be resampled to 96 kHz. Accepts an HTTP(S) URL or a base64 data UR | |
| max_cost_usdopt | FLOAT | 20.00–100000 | Safety cap. If the estimated cost of this run is above this many US dollars the node stops BEFORE sending anything to fal. 0 = no cap. |
| reuse_identical_runopt | BOOLEAN | true | If these exact inputs (the settings AND the same pictures/clips/audio) were already paid for and the files are still in output/fal, return them instead of paying again - also after a ComfyUI restart. Turn off for a fresh take with the same settings. |
| extra_jsonopt | STRING | Advanced: a JSON object merged into the request last, for any fal field this node has no box for. Example: {"seed": 7}. Leave empty normally. | |
| max_concurrentopt | INT | 11–32 | How many paid fal calls may run at the same time in one run, across every fal node. 1 (default) = one after another. This node starts its paid part only while fewer than this many fal calls are running. Once any fal node fails, the ones still waiting are not started, so nothing more is billed. |
Outputs (4)
| Name | Type | Description |
|---|---|---|
| video | VIDEO | — |
| video_path | STRING | — |
| expanded_prompt | STRING | — |
| info | STRING | JSON: request id, cost estimate, saved files and fal's full answer. |