Prisma

Using OSS models to build AI apps with millions of users — Hassan El Mghari

Jul 15, 2025 · 18:47

Hassan El Mghari, a software engineer at Together.ai, explains how he builds open source AI apps that attract millions of users, including roomGPT.io (2.9 million users), restorePhotos.io (1.1 million), Blinkshot.io (1 million visitors), and LlamaCoder.io (1.4 million visitors). He details his simple four-step tech stack: user input, a single API call to an open source model on Together.ai, storing results in a database, and displaying output. His process emphasizes keeping ideas simple enough to describe in five words, spending 80% of time on UI, launching early, and incorporating the latest models like Fluxionel for virality. He advises naming apps with short, memorable names, making them free and open source to encourage sharing, and iterating rapidly—most apps fail, but the key is to keep building. He funds compute through sponsorships from Together.ai and partners like Neon and Clerk, which provide free services for his open source projects.

GPT Web App Generator - 10,000 apps created in a month: Matija Sosic

Jan 26, 2024 · 9:23

Matija Sosic, CEO and co-founder of Wasp, demonstrates how his team built mage, a GPT-powered full-stack web app generator that produced over 10,000 applications in one month. Mage specializes in generating React, Node.js, Prisma, and Wasp apps from plain English descriptions, thanks to three key factors: specialization in full-stack web apps, leveraging Wasp's high-level declarative configuration to reduce boilerplate and errors, and an automated error-fixing phase. A typical app uses 25,000 to 60,000 tokens and costs 10 to 20 cents by combining GPT-3.5 for implementation and GPT-4 for planning, versus $1–$2 with GPT-4 alone. Mage serves as a highly customized cross-starter, with current limitations around lack of interactive debugging, which is planned next. Future directions include live debugging and potentially fine-tuning an LLM for Wasp.