Automate image editing & Instagram posting with Nano Banana & GPT-5 captions

Auto-Edit Google Drive Images with Nano Banana + Social Auto-Post

Drop an image into Google Drive and let this workflow handle the rest: it auto-cleans and enhances the image with Google’s Nano Banana (via Wavespeed API), generates a catchy caption with GPT-5, and publishes directly to your connected social accounts using Postiz.

👉 Watch step-by-step video tutorials of workflows like these on https://www.youtube.com/watch?v=4wk6PYgBtBM&list=PL05w1TE8X3bb1H9lXBqUy98zmTrrPP-s1

What it does

- Triggers from Google Drive when a new image is uploaded - Sends the image to Nano Banana to declutter, brighten, and make it real-estate/photo-listing ready - Polls for the edited result until it’s complete - Logs the edited image URL into Google Sheets for tracking - Downloads and uploads the edited image into Postiz media library - Generates an engaging caption with GPT-5 Caption Agent - Publishes instantly to Instagram (can be extended to TikTok, LinkedIn, etc.)

Perfect for

- Real-estate agents posting property shots - Ecommerce sellers updating product catalogs - Social media marketers needing fast, polished posts - Apps & Services

Tools Used - Google Drive (Trigger) - Wavespeed API – Google Nano Banana (Image editing) - Google Sheets (Logging) - Postiz (Social scheduling/posting) - OpenAI GPT-5 (Caption agent)