Auto-Create & Post Social Media Reels with Google Veo-3 AI and GPT

**GPT-5 + Veo-3 Instagram Reel Auto-Creator & Auto-Poster** Description: This n8n workflow is a fully automated short-form video content engine that takes your creative idea, turns it into a cinematic video using Google Veo-3 via Wavespeed API, writes an engaging Instagram caption with GPT-5, and instantly posts it to Instagram via Postiz—all without lifting a finger. It's designed for content creators, social media managers, and brands who want to produce high-quality, on-brand reels at scale without manual editing or posting. **Watch Step-by-step build:** www.youtube.com/@automatewithmarc **Key Features:** - Chat-triggered Automation (You can replace this with On Schedule trigger for automated generation) - Start the workflow with a simple message describing your video idea. - GPT-5 Video Prompt Agent - Transforms your concept into a visually rich, cinematic prompt optimized for Veo-3. - Veo-3 AI Video Generation - Creates a polished short-form reel with cinematic motion, effects, and branding. - **GPT-5 Caption Writer** - Crafts an impactful, scroll-stopping caption tailored for Instagram engagement. - **Auto-Posting with Postiz** - Uploads and schedules (or instantly posts) your reel to Instagram without manual steps. - **Automated Progress Checking** - Wait & retry logic ensures posting only happens when the video is fully generated. **Tech Stack:** - GPT-5 via OpenAI API - AI for prompt engineering & caption creation. - Google Veo-3 (via Wavespeed API) - Next-gen text-to-video model for short-form content. - Postiz API - Multi-platform social media posting automation. - n8n - Orchestration & automation engine. **Ideal Use Cases:** - Instagram Reels / TikTok Creators who want to post daily without editing. - Fitness, Fashion, Travel & Lifestyle Brands looking for high-quality, thematic reels. - Social Media Agencies producing client content at scale. - Event Marketers creating same-day recap videos. **Setup Instructions:** - Add your API keys for OpenAI (GPT-5), Wavespeed (Veo-3), and Postiz. - Connect Postiz to your Instagram account. - Trigger the workflow with a chat message describing your desired video. - Watch your idea transform into a reel—fully captioned and posted automatically. **Why This Workflow Stands Out:** - End-to-end automation from idea to video to caption to Instagram post. - AI-driven creative consistency for brand identity. - Scales your content production without hiring editors. - SEO & engagement-ready captions crafted for social virality.