How to use Grok AI for free and create unlimited talking videos with Gen V AI

Grok AI is quickly becoming one of the most talked‑about models for realistic, cinematic AI video generation. The good news: you can access it for free and create unlimited talking videos straight from your phone using a new app called Gen V AI.

This guide walks you through how to install Gen V AI, connect it to Grok as the default model, and build a full multi‑scene video using just images, scripts, and a bit of editing.

What is Gen V AI and how does it use Grok?

Gen V AI is a mobile app available on both the App Store and Google Play Store. It’s designed for AI video and image generation, and it uses XAI’s Grok as its default model for video generation inside the app.

That means you don’t need an API key, subscription, or credit card to experiment with Grok. You simply install Gen V AI, select video generation, and start creating. The trade‑off is that the app shows ads during and after generation, but in return you get effectively free, unlimited access.

Step 1: Install Gen V AI and set up your account

1. Download the app

• Open the App Store (iOS) or Google Play Store (Android).
• Search for “Gen V AI”.
• Download and open the app.

2. Use a dedicated AI email

• When you first open the app, you’ll be asked to continue with an email or account.
• It’s a good idea to use a dedicated email address just for AI tools. This keeps your logins organized across multiple apps and platforms.

3. Grant basic permissions

• Tap through the initial prompts (continue, allow, etc.).
• Allow the app to access your photos when asked. This is needed to upload reference images and save generated videos to your gallery.

Step 2: Understand the Gen V AI interface

Once inside Gen V AI, you’ll see two main options at the top of the screen:

• Video generation – create talking or cinematic videos.
• Image generation – create still images from text prompts.

For this walkthrough, focus on video generation, since that’s where Grok is used by default.

At the bottom of the video generation screen, you’ll see the model selection. By default, it shows something like XAI Grok. This means Grok is the engine powering your generations. You can tap the arrow to see other models, but leave it on Grok if you want the best lip sync and cinematic quality shown in the examples.

Step 3: Choose the right aspect ratio and resolution

Before you generate anything, set your video format based on where you plan to publish:

• 16:9 – best for standard YouTube videos and horizontal content.
• 9:16 – best for YouTube Shorts, TikTok, Instagram Reels, and Facebook vertical videos.

For resolution, choose 720p to get an HD result that still renders relatively quickly. Higher resolutions may be available but can take longer to generate.

Step 4: Generate a talking video from an existing image

Gen V AI gives you two main ways to create videos:

• Use a reference image you already have.
• Let the app generate both the image and video from your text prompt.

This section covers the first method: using a pre‑generated image (for example, a character portrait created with another AI tool).

1. Create or select your character image

You can create your image with any AI image generator you like, such as ChatGPT’s image tools, Flow AI, or other platforms. The transcript example uses ChatGPT to first write a detailed crime story script and then generate a matching image prompt.

For instance, the user asked ChatGPT to:

• Act as a professional Hollywood scriptwriter.
• Write a realistic one‑scene crime story (Netflix style).
• Provide one image prompt and one video prompt.

ChatGPT responded with a short film concept titled “Wrong Man”, set in an interrogation room. It also generated:

• An image prompt describing the suspect and the detective.
• A video prompt and full dialogue for the scene.

That image prompt was then used to generate a still image of the suspect, which becomes the base for the talking video.

2. Upload your image to Gen V AI

• In Gen V AI, go to Video generation.
• Tap the image plus (+) icon to upload an image.
• Select your character image from your gallery.

This image will be used as the face and pose for your AI‑generated video.

3. Add your video prompt and dialogue

Next, you’ll tell Grok what to do with that image.

• Copy the video prompt from your script (for example, the crime interrogation description from ChatGPT).
• Paste it into the text box in Gen V AI.
• Copy the dialogue for the scene (e.g., the detective and suspect lines) and paste it under or along with the prompt.

It can help to add small notes in brackets to clarify who is speaking. For example:

[Detective (female)] Your fingerprints were at the scene. So tell me, why does an innocent man look this calm?

This helps the model understand which character is talking and how to animate the lips and expressions.

4. Generate and review your first clip

• Tap Create to start generation.
• The app may show an ad while your video renders.
• When it’s done, tap to preview the result.

You should see your original image come to life with smooth lip sync, facial expressions, and cinematic motion that matches your dialogue. This is where Grok’s capabilities really stand out.

5. Download your video

• Tap the download button.
• Allow the app to save the video to your gallery when prompted.

The clip is now stored on your phone and ready to be used as part of a longer video.

Step 5: Keep your character consistent across multiple scenes

If you want to create a longer story (for example, a 1–10 minute short film), you’ll need multiple scenes. A simple trick to keep your character’s face and style consistent is to use screenshots from the end of each clip.

Here’s how to do it:

• Open your generated video in the gallery.
• Pause at the final frame or last expression of the clip.
• Take a screenshot of that frame.
• Crop the screenshot so it’s just the character.
• Save it to your photos.

Now, when you go back to Gen V AI to create the next scene, upload this new screenshot as the reference image. This ensures the next clip starts with the same look and pose your previous scene ended with, giving your entire video a smooth, continuous feel.

Repeat this process—generate a scene, screenshot the last frame, use it for the next scene—until you have all the clips you need.

Step 6: Generate additional scenes with new prompts

For each new scene:

• Upload the latest screenshot as the base image.
• Copy the next part of your script (scene 2, scene 3, etc.).
• Paste the new video prompt and dialogue into Gen V AI.
• Tap Create and wait for the clip to render.

In the crime story example, this is how the second clip continues the interrogation:

• First clip: “Your fingerprints were at the scene. So, tell me, why does an innocent man look this calm?”
• Second clip: “Then explain this.” / “You’re already too late.”

Each clip feels like a natural continuation of the last because the character’s appearance and framing remain consistent.

Step 7: Combine all clips in a video editor

Once you’ve generated all your scenes, it’s time to stitch them together into a single video. You can use any mobile video editor you like, such as CapCut, InShot, or VN. The example workflow uses CapCut.

1. Import your clips

• Open CapCut and tap Create or start a new project.
• Select all the AI‑generated clips from your gallery in the correct order.
• Import them into the timeline.

2. Adjust audio levels

• Tap each clip and increase the volume if needed so the dialogue is clear.
• Make sure all clips have a consistent audio level.

3. Remove watermarks and adjust aspect ratio

CapCut may add its own watermark. To remove it without paying:

• Change the project’s aspect ratio (for example, to 4:3 or another format that crops out the watermark area).
• Reposition your video within the frame so the watermark is outside the visible area.

After exporting, you can also open the final video in your phone’s gallery, use the built‑in crop tool, and trim off any remaining watermark area.

4. Export your final video

• Once everything looks good, tap Export in CapCut.
• Save the video to your gallery at your desired resolution.

You now have a complete AI‑generated short film or talking head video, powered by Grok via Gen V AI.

Alternative: Let Gen V AI create both the image and video

You don’t have to start with a pre‑made image. Gen V AI can also generate everything from a text prompt alone.

To do this:

• Copy your video prompt and full dialogue (for example, scene 1 and scene 2 of your script).
• Paste everything into the text box in Gen V AI.
• Skip the image upload step.
• Tap Create.

The app will generate both the character visuals and the animation based on your description. The result can still be highly realistic, with strong lip sync and expressive motion, even without a reference image.

Tips for better scripts and prompts

The quality of your video depends heavily on your script and prompts. Here are a few tips:

• Be specific in your prompts: Describe the setting, lighting, camera angle, and character emotions (e.g., “dimly lit interrogation room, close‑up on the suspect’s face, tense atmosphere”).
• Use clear dialogue tags: Indicate who is speaking and what their mood is (e.g., “[Detective, calm but firm]” or “[Suspect, nervous but trying to appear confident]”).
• Write short, punchy scenes: AI video tools work best with short segments of dialogue rather than long, unbroken monologues.

If you want help crafting strong prompts and scripts, check out tools that specialize in AI writing and multi‑model workflows, such as the approach described in this guide to using free multi‑model AI APIs.

What you can create with free Grok access

With this Gen V AI + Grok setup, you can experiment with:

• Short crime stories like the “Wrong Man” interrogation example.
• YouTube Shorts and TikToks featuring talking characters or narrators.
• Storytime content where an AI character tells a scripted story.
• Trailer‑style clips for longer projects or channels.

As more models like Grok, GPT‑style systems, and regional models such as Kimi evolve, creators are getting access to increasingly powerful tools for free or very low cost. For a broader look at what’s new in this space, you might like this roundup of recent AI model updates including Grok 4.3 and other free options.

Final thoughts

Gen V AI gives you a simple, ad‑supported way to tap into Grok’s video generation capabilities without paying or managing API keys. By combining strong scripts, smart prompts, consistent images, and basic editing in apps like CapCut, you can produce cinematic, ultra‑realistic AI videos entirely on your phone.

Whether you’re building YouTube content, experimenting with storytelling, or just exploring what’s possible with modern AI, this workflow is a powerful—and completely free—place to start.