MiniMax H3 and Grok Imagine Video 1.5 side by side: specs, capabilities, parameters, and live pricing from the EmpirioLabs catalog.
MiniMax 
xAI Video GenerationMiniMax H3 from MiniMax and Grok Imagine Video 1.5 from xAI are both in the Video Generation category, available through the EmpirioLabs API.
| Spec | MiniMax H3 | Grok Imagine Video 1.5 |
|---|---|---|
| Model ID | minimax-h3 | grok-imagine-video-1-5 |
| Author | MiniMax | xAI |
| Released | Jul 31, 2026 | Jun 16, 2026 |
| Input | Text Image Video Audio | Text Image |
| Output | Video | Video |
| Region | Singapore | - |
| Endpoints | POST /v1/videos/generations | POST /v1/videos/generations |
| Capabilities |
Live rates from the EmpirioLabs catalog for both models. Each rate card always matches what the API charges.
Request parameters each model lists on EmpirioLabs, with the allowed values or range where one applies. A dash marks a parameter the model does not list.
| Parameter | MiniMax H3 | Grok Imagine Video 1.5 |
|---|---|---|
| prompt | string | string |
| mode | auto, t2v, i2v, flf, r2v, regenerate Default: auto | auto, t2v, i2v, r2v Default: auto |
| resolution | 768p, 2k Default: 768p | 480p, 720p, 1080p Default: 720p |
| aspect_ratio | adaptive, 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 Default: adaptive | 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3 |
| duration | 4 to 15 Default: 6 | 1 to 15 Default: 10 |
| image | string | string |
| last_frame | string | - |
| video | string | - |
| audio | string | - |
| base_video | string | - |
| watermark | boolean Default: false | - |
| enhance_prompt | boolean Default: false | - |
| reference_images | - | string |
MiniMax H3 generates 4 to 15 second clips at 24 fps in 768p or 2K, each with a native stereo audio track.
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.
Generates video from a text prompt on its own, from a source image, or from up to seven reference images that keep characters and objects consistent across the shot.
<IMAGE_1> and <IMAGE_2> walking together through a neon-lit street at night.The mode is detected from what you send, and can be set explicitly with the mode parameter.
1080p is available for text-to-video and image-to-video. Reference-to-video supports up to 720p.
Supports prompt, mode, a source image or reference images (URL or upload), duration, resolution, and aspect ratio.
MiniMax H3 runs through POST /v1/videos/generations. The request returns a job_id right away; poll GET /v1/jobs/{job_id} until the job completes and read the output URLs from the result. Both models are called through the same endpoint. Set model to minimax-h3 or grok-imagine-video-1-5. Get an API key from the EmpirioLabs dashboard.
curl https://api.empiriolabs.ai/v1/videos/generations \
-H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "minimax-h3",
"prompt": "Describe what you want MiniMax H3 to generate."
}'Prompt tests and comparison runs that cover both models.
MiniMax H3 is the newer release (Jul 31, 2026); Grok Imagine Video 1.5 was released on Jun 16, 2026. Input types only MiniMax H3 accepts: Audio, Video. Capabilities listed only for MiniMax H3: audio out, audio in, multimodal. The specs, rate cards, and parameters on this page come from the live EmpirioLabs catalog.
MiniMax H3 is the newer release (Jul 31, 2026); Grok Imagine Video 1.5 was released on Jun 16, 2026.
The two models are priced on different units or tiers, so compare the live rate cards on this page. They always match what the API charges.
Yes. Both models use POST /v1/videos/generations with the same EmpirioLabs API key, so most integrations switch by changing the model value. Check the parameters table on this page first if you rely on a model-specific parameter.
Yes. Open each model in the EmpirioLabs playground and run the same prompt on both, with the parameters the API exposes.
Check out our pricing or reach out if you want your own model deployed on our stack.
