AI Smile Filter: Add a Subtle, Natural or Bright Smile to Your Photo

Subtle gives a gentle closed-mouth smile with a little warmth around the eyes, which suits professional headshots. Natural, the default, is a relaxed open smile with some teeth showing. Bright is a wide, joyful smile with clear teeth and happy eyes, the kind you see in holiday photos. Start with Natural and adjust from there.

The prompt tells the AI to keep the original composition, clothing, background and lighting and change only the expression. Small differences can still appear, because the whole image is regenerated. GPT Image 2.5 also outputs a square image, so a tall or wide photo may be reframed. Nano Banana 2.1 does not force a square size on this template.

Not selectively. You can't point at one face, and the prompt is written for a single person. On a group photo the AI may change several expressions, or not the one you wanted. For a group shot, crop the person you want to fix, run the filter on that crop, then place it back in a photo editor.

It is a simulation, not a record of a moment that happened. The AI adjusts the cheeks, the crinkles around the eyes and the curve of the mouth together, which reads far more natural than warping the lips alone. It works best on a sharp, well-lit, front-facing portrait with the mouth uncovered. Small or side-on faces give less convincing teeth and eyes.

Nano Banana 2.1 costs 4 credits per image and GPT Image 2.5 costs 8. The smile intensity doesn't change the price. Each run gives one image, so trying all three intensities costs 12 credits on Nano Banana 2.1 or 24 on GPT Image 2.5. New accounts get free credits plus a daily check-in bonus.

No. Passports, ID cards and visa applications require an unedited photo, usually with a neutral expression, and an edited one can be rejected. Keep the filter for personal and social photos. Edit pictures of yourself, or of people who are fine with it, and don't use it to change how someone appears in a photo that is meant as evidence or a record.