Open-source video models

Member lesson

The open video models worth knowing

Lesson 2 of 10 in Open-source video models.

Checked against the makers' documentation on 25 September 2026.

LTX-2.5: The World Model the World Builds On · LTX_io
Lesson

Four families are worth knowing by name. MiniMax H3, published on Hugging Face on 28 July 2026, is a 33-billion-parameter transformer that generates video with stereo sound, 4 to 15 seconds long at 24 frames a second, with a 768-pixel short edge from the open weights, because its 2K stage is still available only through MiniMax's paid API. LTX-2.5 from Lightricks, published on 23 July 2026, is a 22-billion-parameter audio and video model whose production pipeline defaults to 1024 by 1536 at 24 frames a second and can reach 3840 by 2176. Both lean on large text encoders, Qwen3-VL-32B for H3 and a 12-billion-parameter Gemma 4 for LTX-2.5.

jul 2025nov 2025jul 202612341 wan 2.2 · 27b · apache 2.02 hunyuan 1.5 · 8.3b · no eu, uk, korea3 ltx-2.5 · 22b, sound · free under $10m4 minimax h3 · 33b, sound · no eu, uk, korea, usacircle size = parameters
Four open video model families on a timeline from July 2025 to September 2026, sized by parameters, with each licence underneath.
An ink drawing of four film cameras on one long table, from a large red studio camera on a tripod with cables, through a blue camcorder with a microphone, to a small green handheld camera and a tiny one.
Four families of open model, from the heavy studio rig to the pocket camera.
Member

The rest of this is for members.

You have read the opening of this lesson. The rest of it comes with a membership.

One membership covers all four courses and Brands.

  • All lessons in the four Learn courses
  • All brand breakdowns in the Brands section
  • All quizzes, flashcards and crosswords
  • An AI teacher on every lesson, for up to 60 questions a day
  • All course material published during the membership

Price

Membership is from $12 a month on the Yearly plan, which is charged at $144 once a year. Lifetime access is $59, paid once.Membership is from ₹200 a month on the Yearly plan, which is charged at ₹2,400 + GST once a year. Lifetime access is ₹3,999 + GST, paid once.

Check what stuck

Members only

You can't take this check yet.

Members answer these 3 questions and keep the ticket for this lesson. Every lesson has one.

  1. Question 1, locked

    Which of these words means this? “The design under every model here, a transformer that removes noise from a compressed version of the whole clip over a set number of steps.”

    • Excluded territory
    • Diffusion transformer
    • ZeroGPU
    • Serverless GPU
  2. Question 2, locked

    Which of these words means this? “The count of learned numbers in a model, which sets how much memory its weights need before any compression.”

    • Distilled checkpoint
    • Model CPU offload
    • Workflow
    • Parameters
  3. Question 3, locked

    Which of these words means this? “Wan 2.2's approach of using one 14-billion-parameter expert for the noisy early steps and another for the fine detail at the end.”

    • Native audio
    • VAE
    • Template
    • Mixture of experts

Elsewhere in the library

Hear about new courses.

Leave an email and we will tell you when something new lands. We do not write often.