Character.AI's newest feature can bring a picture to uncanny life

• Character.AI's new AvatarFX tool can turn a single photo into a realistic video
• The video shows a still image speaking with synced lip movements, gestures, and longform performances
• The tool supports everything from human portraits to mythical creatures and talking inanimate objects

Images may be worth a thousand words, but Character.AI doesn't see any reason that the image shouldn't speak those words itself. The company has a new tool called AvatarFX that turns still images into expressive, speaking, singing, gesturing video avatars. And not just photos of people, animals, paintings of mythical beasts, even an inanimate object can talk and express emotion when you include a voice sample and script.

AvatarFX produces surprisingly convincing videos. Everything from lip-sync accuracy, nuanced head tilts, eyebrow raises, and even appropriately dramatic hand gestures is all there. In a world already swirling with AI-generated text, images, songs, and now entire podcasts, AvatarFX might sound like just another clever toy. But what makes it special is how smoothly it connects voice to visuals. You can feed it a portrait, a line of dialogue, and a tone, and Character.AI calls what comes out a performance, one capable of long-form videos too, not just a few seconds.

That's thanks to the model's temporal consistency, a fancy way of saying the avatar doesn’t suddenly grow a third eyebrow between sentences or forget where its chin goes mid-monologue. The movement of the face, hands, and body syncs with what’s being said, and the final result looks, if not alive, then at least lively enough to star in a late-night infomercial or guest-host a podcast about space lizards. Your creativity is the only thing standing between you and an AI-generated soap opera starring the family fridge. You can see some examples in the demo below.

Avatar alive

Of course, the magical talking picture frame fantasy comes with its fair share of baggage. An AI tool that can generate lifelike videos raises some understandable concerns. Character.AI does seem to be taking those concerns seriously with a suite of built-in safety measures for AvatarFX.

That includes a ban on generating content from images of minors or public figures. The tool also scrambles human-uploaded faces so they’re no longer exact likenesses, and all the scripts are checked for appropriateness. Should that not be enough, every video has a watermark to make it clear this isn’t real footage, just some impressively animated pixels. There’s also a strict one-strike policy for breaking the rules.

AvatarFX is not without precedent. Tools like HeyGen, Synthesia, and Runway have also pushed the boundaries of AI video generation. But Character.AI’s entry into the space ups the ante by fusing expressive avatars with its signature chat personalities. These aren’t just talking heads; they’re characters with backstories, personalities, and the ability to remember what you said last time you talked.

AvatarFX is currently in a test phase, with Character.AI+ subscribers likely to get first dibs once it rolls out. For now, you can join a waitlist and start dreaming about which of your friends’ selfies would make the best Shakespearean monologue delivery system. Or which version of your childhood stuffed animal might finally become your therapist.

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