H3 Max 4K request fails: H3 takes 2K and 4K as 768p upscales

Asking MiniMax H3 Max for 4K fails with Cannot price resolution: minimax-h3-max accepts 480p, 768p, or 1080p. The 2K and 4K tiers sit on the plain minimax-h3 model, where they are upscales of native 768p and cost $0.1625 and $0.20 per second, or $1.30 and $1.60 for 8 seconds on Sume.

For comparison, an 8-second H3 Max clip at 1080p is $1.60, the same as H3 at 4K. Prices come from the Sume price tool (read 2026-10-09).

Which model has which tier

Native here means the 768p row. If you need real 4K pixels from a model, Omni is the one with a 4K tier of its own, at the highest per-second rate in the table.

The fix

Change the model to minimax-h3 and keep 4K in the body. Nothing else needs to change for a text or image start.

{
  "model": "minimax-h3",
  "prompt": "A lantern boat drifts under a bridge at dusk",
  "resolution": "4K",
  "duration": 8,
  "aspect_ratio": "16:9",
  "mode": "async"
}

The 2K and 4K rows by length

Because MiniMax bills per second, the 2K and 4K rows scale the same way as the others. Here are the three lengths you are most likely to use.

Limits and gotchas

If a platform caps at 1080p, 4K buys nothing. Check the destination first.

• The 2K and 4K rows are priced upscales of the 768p render, so judge the 768p take first.
• H3 Max never offers 2K or 4K. Its top tier is 1080p, a refinement of native 768p.
• Duration still has to be 5-15 seconds on both MiniMax models.