Gemini Omni Flash 1.2 API

Updated 6 Nov 2026

What is Gemini Omni Flash 1.2?

Gemini Omni Flash 1.2 is Google's multimodal video model, released November 6, 2026 as the next step after Gemini Omni Flash 1.1. Text, still images, named characters, and a source video all go into the model context, and the output is video with audio. Google orders the name as Gemini Omni 1.2 Flash; on UnificAlly it runs as google/gemini-omni-flash-1.2-video for generation and google/gemini-omni-flash-1.2-video-edit for editing.

The update is about control. Clips can now be any whole number of seconds from 3 to 15, so a 7 second product shot or a 13 second scene no longer has to be padded or cut to fit a fixed length. References hold better: a character or setting you upload keeps its look across the clip instead of drifting after a cut. Jump cuts are easier to direct from the prompt, and the picture is sharper overall.

The request body is the same as 1.1. Existing integrations move over by swapping the model string; the wider duration range and the longer edit window are new options on top.

What's new in Gemini Omni Flash 1.2

What Gemini Omni Flash 1.2 is best for

• Character-led short videos

  Upload up to three named characters and call them out as @Character1, @Character2 in the prompt when the same people need to appear across shots.

• Exact-length clips

  Ads, social cutdowns, and title cards that need a specific length, from 3 to 15 seconds, without trimming afterwards.

• Multi-shot sequences

  Short scenes with deliberate cuts between angles or moments, directed from one prompt.

• Edits of an existing video

  Restyle a clip, change the setting, or replace a subject across up to 15 seconds of one source video.

• Cheap prompt drafts

  Test direction at native 360p, then rerun the version you like at 720p, 1080p, or 4K with the same seed.

• Voice-guided scenes

  Attach a reference and pick up to five voice presets when the video needs spoken lines from specific characters.

Gemini Omni Flash 1.2 use cases

Build a 12 second product ad from a packshot and a lifestyle still, with a cut from the hero shot to the product in use. Keep a recurring mascot on-model across a series of short videos by uploading the same character reference each time. Turn a start frame and an end frame into a 6 second transition between two layouts. Take a 30 second creator video and rework a 15 second stretch of it into a new setting while the rest stays untouched. Draft five prompt variations at 360p, pick one, and render it at 4K.

Gemini Omni Flash 1.2 limitations

Extend is not available on the 1.2 endpoints yet. Generation runs prompt, frame, and reference modes; frames and references cannot be combined in one request.

First-and-last-frame mode is capped at 10 seconds, and the end frame needs a start frame. Generation takes up to 7 reference images and 3 characters; edit takes exactly one source video plus up to 5 reference images and 3 characters.

360p and 720p are the native resolutions. 1080p and 4K are upscaled after generation, not generated natively at those sizes.

Audio input stays narrow: voice presets and per-character voice fields are the supported path, and the model does not take an arbitrary uploaded audio track. Speech, captions, brand marks, and people-centric edits still need a review pass. Generated videos carry Google's SynthID watermark.

Gemini Omni Flash 1.2 vs Gemini Omni Flash 1.1

For API users the differences are length and control. 1.1 generates 4, 6, 8, or 10 second clips; 1.2 takes any whole second from 3 to 15. 1.1 edits a window of up to 10 seconds at a flat price per resolution; 1.2 edits up to 15 seconds and bills by the edited length, so short edits cost less. 1.2 also follows references and prompted cuts more closely and renders sharper detail. Both share the same request body, and 1.1 is on its way out, so new work belongs on 1.2.

When to use Gemini Omni Flash 1.2

Use Gemini Omni Flash 1.2 when a video job needs more than a prompt: named characters that must stay consistent, a specific clip length, a cut you want to direct, a first and last frame, voice presets, or a targeted edit of an existing video. Use Veo 3.1 when the job depends on Extend as a separate call.

Gemini Omni Flash 1.2 API examples

Call Gemini Omni Flash 1.2 from any language by POSTing to /v1/tasks. Full parameter docs live at docs.unifically.com/models/video/google/gemini-omni-flash-1.2-video, and the edit model at docs.unifically.com/models/video/google/gemini-omni-flash-1.2-video-edit.

curl -X POST https://api.unifically.com/v1/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "google/gemini-omni-flash-1.2-video",
    "input": {
      "prompt": "@Character1 walks into a sunlit bakery and picks up a croissant. Cut to a close-up of her first bite.",
      "reference_characters": [
        {
          "image_urls": [
            "CHARACTER_IMAGE_URL"
          ],
          "name": "Mia"
        }
      ],
      "duration": 7,
      "resolution": "720p",
      "aspect_ratio": "9:16"
    }
  }'

Successful submission returns a task_id. Poll GET /v1/tasks/<task_id> or set a callback_url on the request to receive the finished result.