MiniMax H3 API Pricing in 2026: $0.13/Second, a Third Tier Nobody Lists, and the 6 Limits That Decide Your Bill

MiniMax H3 video generation is billed primarily by output duration, with official rates of $0.13 per second for 2K and $0.08 per second for 768P, while upgrading 768P footage to 2K costs an additional $0.05 per second and therefore provides savings only for discarded drafts. The account describes an August 2026 test using Atlas Cloud, where 2K H3 generation cost $0.14 per second and a 10-second beverage advertisement with native stereo audio cost $1.40, alongside an itemized $9.23 set of tests and experiments. It highlights operational factors that can affect costs and reliability, including differing UI and API duration defaults, billable successful requests with invalid reference URLs, charges for reference-video input, paid reference images beyond the first five, delayed price reporting, and free submit-time validation failures. Published limits include two concurrent video tasks on free accounts and 15 on paid accounts, request-size and reference-media caps, and a three-second callback challenge requirement; the account also reports that mutually exclusive first-frame and reference inputs may be silently ignored rather than rejected. The discussion recommends explicitly setting duration and aspect ratio, validating media and input combinations in client code, testing prompts with shorter clips, and considering composition-locking still images to reduce costly retries, while noting licensing restrictions that apply to self-hosted H3 weights but not hosted API use.

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