Flat AI Video Studio

Flat AI (flatai.org) is a creative workspace: images, video, short films and music videos, with reusable characters. Video Studio’s main model is a customized MiniMax H3. Text, image and first/last-frame modes list clips up to 10 seconds. Extend can chain sequences up to 2 minutes. Export copy: HD for YouTube, Reels and TikTok. ImgToVid does not run Flat AI; the generator on this page drafts on Seedance 2.5.

01 — Capabilities

A session director studio, not an 8-second prompt model

Public Flat AI pages sell Cinema, Music Video and clip studios billed per session. Ten seconds is the H3 generate cap. Two minutes is an extend chain, not one take.

01
Customized MiniMax H3, directed in a session
Video Studio guide: H3 is the main model. Describe subject, action, camera and sound, or upload a first frame and optional last frame. Standard is faster; Quality takes longer. The studio runs in its own session, billed while you create — skip the hourly figure; check their page.
02
Generate up to 10 seconds; extend up to 2 minutes
Text / image / first-last modes: clips up to 10 seconds. H3 Extend Video: upload a source up to 25 MB, describe the next moment, optionally add up to 5 images and 1 audio reference. Combined sequences can reach 2 minutes. That chain is not a one-shot length.
03
References, a character sheet, then HD export
Reference to Video: up to 5 image refs, 1 video ref and 1 audio ref. Character Sheet builds a multi-angle sheet plus an orbit video. Homepage: download in HD for YouTube, Reels and TikTok. Upscale X2 on eligible clips keeps the audio.
04
Lip sync uses the first 10 seconds of uploaded audio
Guide: Lip Sync uses your uploaded audio where available; only the first 10 seconds are used. Music Video Studio times scenes to a track. This site does not open those studios.

02 — Prompt to output

Prompts that match the clips above

Each prompt describes the picture on its card. “Use this prompt” sends that text to Create. The generator on this page runs Seedance 2.5, not Flat AI.

01 · Portrait
PromptClose-up of a young man with curly hair in a grey knit sweater, soft window light. He glances away, then smiles. Slow push-in, shallow depth of field.
02 · Product
PromptA white leather sneaker on a pale grey studio backdrop, soft diffused light. The camera orbits slowly. Stitching stays sharp, the look stays minimal.
03 · Street
PromptA slow dolly down a cobblestone lane in an old European village. Climbing roses on stone walls, café tables in morning sun, a few people walking in the distance.
04 · Character
PromptA young woman with shoulder-length brown hair in an olive t-shirt, late-afternoon gold light. She turns her head and looks off. Breeze in her hair, a handheld feel.

03 — Where it fits

Jobs a MiniMax H3 director studio is selling

Public pages point at a directed clip, a short film, or a music video. They do not sell one Flat-branded 8-second prompt model for every job.

A 10-second H3 clip with sound
Text, still, or first and last frame. Picture is HD; upscale X2 on eligible videos. This page does not open the session.
A short film or music video in Cinema / Music Studio
Plan shot by shot, reuse a character, lip-sync to a track. That run stays inside Flat AI.
An extend chain up to 2 minutes
Describe the next moment and keep going. Two minutes is the combined cap, not every generate.
A draft shot on ImgToVid
Write the shot here. Seedance 2.5 carries the prompt into Create. Membership and credits are checked there.

04 — Verdict

What Flat AI actually is

Strengths

Video Studio on customized MiniMax H3
Generate listed up to 10 seconds; extend chain up to 2 minutes
HD export; Upscale X2 keeps audio
Reusable characters across Cinema, Music Video and clips

Trade-offs

Not a first-party one-shot prompt model
Studio is billed per session, separate from Unlimited
Flat AI is not available on ImgToVid
Marked coming soon on this site

05 — Side by side

Flat AI, Veo 3.1 and Kling 4.0

Flat AI is a MiniMax H3 director studio billed per session. Veo 3.1 and Kling 4.0 numbers below are from those vendors’ public docs — they are one-shot generate models, not a Flat AI extend chain.

	Flat AI	Veo 3.1	Kling 4.0
Developer	Flat AI	Google DeepMind	Kuaishou
Single clip	H3 up to 10s; extend chain up to 2 min	4, 6 or 8 seconds	3–30 seconds
Picture	HD export; Upscale X2 on eligible clips	720p, 1080p, 4K at 24 fps	720p, 1080p and 4K listed
Sound	Synced H3 audio; lip sync first 10s of upload	Native, with the picture	Stereo, with lip sync
Start from	Text, still, first/last, refs, or a character	Prompt, still, first and last frame	Keyframes or 15 references
On ImgToVid	Coming soon	Coming soon	Coming soon

06 — How it works

Start a clip on ImgToVid

Step 1
Describe one shot
Subject, action, camera. Flat AI will not be the model that runs it.
Step 2
Use the generator on this page
It runs Seedance 2.5, because Flat AI is not offered here. The prompt and the settings carry into Create.
Step 3
Generate in Create
Membership and credits are checked there. Coming back to this page does not switch the model over to Flat AI.

07 — FAQ

Flat AI, in plain terms

What is Flat AI?

Flat AI is a creative workspace at flatai.org. Video Studio runs a customized MiniMax H3 for clips, plus Cinema and Music Video studios. It is not a first-party 8-second prompt model. ImgToVid does not host Flat AI.

How long is a Flat AI clip?

H3 text, image and first/last-frame modes list up to 10 seconds. Extend can chain combined sequences up to 2 minutes. Ten seconds is the generate cap; two minutes is the chain, not every take on this site.

Does Flat AI generate audio?

Yes — H3 is described as picture with synchronized audio. Lip Sync uses uploaded audio, first 10 seconds only. Music Video Studio times scenes to a track. That is studio sound inside Flat AI, not a Flat-branded one-shot soundtrack on ImgToVid.

What picture size can I export?

Homepage: download in HD for YouTube, Reels and TikTok. After generate, Upscale X2 on eligible videos increases resolution and keeps the audio. Public pages do not publish a full 480p–4K generate table.

Can I generate Flat AI videos on ImgToVid?

No. The generator on this page runs Seedance 2.5 so you can draft a shot. Flat AI is marked coming soon.

Can I use the results commercially?

Commercial use of anything you generate on ImgToVid depends on your plan. Check Pricing and our Terms before you publish, and make sure prompts and uploads do not infringe someone else’s rights.