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Overview

Mirage Avatar X is our next-generation avatar model — the most powerful we’ve ever made. Unmatched realism. Hyper-expressive emotion. Natural movements. Now available in Captions. There are two ways to get an avatar, and both start in the same place:
  1. Start in the avatar library. Browse 200+ ready-made avatars spanning diverse people, personas, and looks you can pick and generate with immediately.
  2. Or make your own custom avatar. If you can’t find what you’re looking for, create a custom avatar simply by describing the person you have in mind with a text prompt. When you save it, your avatar lands in the same avatar library as the presets, ready to use in any video.
On Captions on Web, the Avatar library is where you browse our extensive and diverse range of ready-made avatars.

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Open the Avatar library

Click the Avatar Library in the left sidebar to open the Avatars page. The Avatar library lists public avatar (available to everyone) and private avatars (avatars you created, visible only to you).
Avatars page in the Captions desktop sidebar showing the Actors library

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Create a custom avatar

Click Create avatar. You can start in one of two ways:
  • Create an AI twin
  • Describe a new avatar based on a prompt
Create actor options for a reference image or a text prompt

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Create an AI twin

Record a short video of yourself reading the script that shows up on screen. It should show:
  • The face clearly
  • The mouth open with teeth visible
  • A mid or close-up shot
  • Only one person in the frame
  • A subject whose gender matches the speaker voice you plan to use
Reference image requirements for creating an actor from a photo
After recording the video, you can optionally upload reference images of yourself in different environments. This will help Captions generate more diverse looks for your AI twin.After confirming reference images, Captions then generates a few sample looks for the avatar.To try another variation, click New look. In the prompt field, describe the changes you want. You can also upload images of objects or other references to guide the new look. Creating new looks uses credits.
New look prompt and reference uploads for an actor
Saving an actor look to the Actors library
When you have the look you want, save it to your Avatar library.To review avatars you generated earlier, click History.
History of previously generated actors

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Create an avatar from a prompt

Click Create avatar, then choose Describe your avatar.
Describe your actor option when creating an actor from a prompt
Describe the person you want in one flowing scene description. Include appearance details such as gender, age, hair, clothing, and accessories, how they face the camera, and the setting or lighting you want. Match the actor to the voice you plan to use. For a full prompt guide with examples, see the Mirage prompt guide.
Actor prompt field with optional random prompt from the dice icon
After you submit the prompt, Captions generates an avatar. You can regenerate a different avatar by clicking the regenerate button.
Choosing one of two generated actors after submitting a prompt

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Browse the avatar library

Tap All avatars to open the full avatar library. You will find all publicly available actors, plus your own private custom actors. Avatars you created on your account are labeled with a Private tag.

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Create a custom avatar from a prompt

Tap Create AI Twin to create an avatar based on your face. You will be asked to take a selfie. Keep your whole face visible and stay close enough to the camera that your face is clear in the frame.After the selfie, you can record a few short voice recordings by reading the scripts on screen. This step is optional and you can skip it, but it helps your actor sound like you. If you record voice clips, you can choose which AI model generates your voice clone. The ElevenLabs model works well in most cases. If you want your original accent preserved as closely as possible, select the Mirage model. Actor generation can take a few minutes. When it finishes, your new AI Twin appears in the Actor library.

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Create a custom avatar from a prompt

From the Avatar library, tap Describe avatar. Describe your actor and their characteristics in the prompt field. You can regenerate if you are not happy with the result. When you like the avatar, tap Save avatar to add them to your library.

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Avatar voice and looks

Tap an actor in the Avatar library to open their details. From there, you can change the actor’s voice. To add another appearance, tap New look and describe the new look in text. Tap the triple-dot icon to open the avatar’s settings. You can rename the avatar or delete them from your library.
Last modified on August 19, 2026