Gemini Omni Flash tutorial
Practical Gemini Omni Flash workflow inside Flixly: choosing text, image or reference input, clip length and aspect ratio, and how the video model differs from Gemini 3.1 Flash TTS.
TL;DR
Gemini Omni Flash is a video model, not a voice model. On Flixly it makes 4, 6, 8 or 10 second clips in 16:9 or 9:16 from a text prompt, an image or references, and Gemini Omni Flash v1.1 allows any length from 3 to 10 seconds. For narration, use Gemini 3.1 Flash TTS in Text to Speech, and check the in-app credit quote before each run.
The better question behind Gemini Omni Flash
People search for Gemini Omni Flash expecting a magic button. The question that matters is which input mode, clip length and aspect ratio to pick so the first result fits your project, and how the model differs from Gemini 3.1 Flash TTS, a separate speech model with a similar name.
Start at the Video Generator, choose Gemini Omni Flash from the model list, and pick text, image or reference input.
Direct answer first
Gemini Omni Flash is a video model. On Flixly it generates 4, 6, 8 or 10 second clips in 16:9 or 9:16 from a text prompt, a starting image or reference images. Gemini Omni Flash v1.1 offers any whole-second length from 3 to 10 seconds and also lists video-to-video among its capabilities. The app quotes the credit cost before each run.
Layers most guides skip
Pick the input mode first
- Text to video for concept shots when you have no source art.
- Image to Video when a product shot or keyframe must stay recognizable.
- Reference to Video when a character or object from your references should appear in a new scene.
Duration and aspect ratio
Choose 16:9 for YouTube and web, 9:16 for Reels, TikTok and Shorts. Test prompts at a short duration, then rerun the approved version at the length you need, since longer clips generally cost more.
Prompt structure
Describe subject, action, camera movement and lighting, in that order. One clear action per clip usually works better than packing several events into a short take.
Tradeoffs nobody mentions
Gemini Omni Flash makes video, not speech. For narration, use Text to Speech with Gemini 3.1 Flash TTS, then match mouth movement with Lip Sync. Clips top out at 10 seconds, so longer pieces need several shots or the Long Video Generator.
| Setting | Gemini Omni Flash | Gemini Omni Flash v1.1 | Gemini 3.1 Flash TTS |
|---|---|---|---|
| Output | Video | Video | Speech audio |
| Durations | 4, 6, 8, 10 s | 3 to 10 s | n/a |
| Aspect ratios | 16:9, 9:16 | 16:9, 9:16 | n/a |
| Inputs | Text, image, reference | Text, image, reference, video | Text |
| Cost | Quoted in-app | Quoted in-app | Quoted in-app |
Step-by-step instructions
- Open the Video Generator and select Gemini Omni Flash or Gemini Omni Flash v1.1.
- Choose text, image or reference mode and upload any source images.
- Write a prompt covering subject, action, camera and lighting.
- Set the aspect ratio (16:9 or 9:16) and a short duration for the first test.
- Check the credit quote, then hit generate.
- Review the clip and change one prompt element at a time before regenerating.
- When the shot is right, rerun it at your final duration.
- Run the result through Auto Captions, which returns a captioned video ready to post.
Credit cost example
A 4-second test clip costs less than a 10-second final, and the app shows the quote before every job. Buy a credit pack with room for a few test runs when you try a new prompt.
One decision rule
Use Gemini Omni Flash when 4, 6, 8 or 10 seconds fits the shot; switch to Gemini Omni Flash v1.1 when you need an in-between length such as 5 or 7 seconds.
Frequently Asked Questions
Is Gemini Omni Flash a text-to-speech model?▾
No. Gemini Omni Flash generates video. Gemini 3.1 Flash TTS is a separate Google speech model that you'll find in Flixly's Text to Speech tool.
What clip lengths does Gemini Omni Flash support?▾
Gemini Omni Flash offers 4, 6, 8 or 10 second clips. Gemini Omni Flash v1.1 lets you pick any whole-second length from 3 to 10 seconds.
Which aspect ratios can I use?▾
Both versions support 16:9 landscape and 9:16 vertical, so you can target YouTube and web or Reels, TikTok and Shorts.
Can I add a voiceover and lip sync?▾
Yes, as separate steps. Generate narration in Text to Speech (for example with Gemini 3.1 Flash TTS), then use Lip Sync to match a character's mouth to that audio.
How many credits does a Gemini Omni Flash clip cost?▾
It depends on the version and duration you choose. Flixly shows the exact credit quote before you generate, and credits come from one-time credit packs.
