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Multi-Model AI Subscription Platform for Affordable Access to Premium AI Models

The client

  • One unified platform that gives access to all top AI models.
  • Subscription tiers (Pro, Enterprise, etc) tailored to different user segments.
  • Predefined use-case prompts to make AI more approachable for non-technical users.
  • Cost optimization through shared usage and enterprise-level API deals.

Client Overview

Multi-Model AI Subscription Platform for Affordable Access to Premium AI Models

Our client is an AI startup that aims to make cutting-edge AI tools accessible to a broader audience at an affordable price. Their vision was to create a single platform where users could interact with multiple premium AI models — without paying for each subscription separately.

Business Challenge

AI models like ChatGPT-5, Google Gemini, Alibaba Cloud AI, and Grok (from X.AI) are powerful, but subscribing to each one individually can be prohibitively expensive for individuals, startups, and even enterprises.

Modules

Key Features

01

Multi-Model Access

  • Integrated APIs from OpenAI (ChatGPT-5), Google Gemini, Alibaba Cloud AI, and Grok (X.AI).
  • Intelligent routing system that selects the most appropriate model based on user needs and cost efficiency.

02

Subscription-Based Model

  • Pro Plan: Access to all models with standard limits.
  • Enterprise Plan: Higher request limits, advanced analytics, and priority processing.
  • Secure payment gateway integration.

03

Cost Optimization & Fair Usage

  • API usage pooling across all subscribers.
  • Dynamic token allocation to ensure heavy usage does not impact platform stability.
  • Model-switching logic to route simpler queries to cost-efficient models.

04

User Dashboard

  • Unified chat interface with model-switch dropdown.
  • Usage tracking and quota visibility.
  • Saved conversations & export options.

05

Predefined Prompt Library

  • Coding Assistance – Optimized prompts for debugging, code generation, and learning new frameworks.
  • Content Creation – Ready-to-use templates for blogs, marketing copy, and social media posts.
  • Business Insights – Market analysis, competitor research, and strategy recommendations.
  • Data Analysis – Natural language queries for spreadsheet/data insights.
  • Creative Writing – Story ideas, scripts, and brainstorming tools.
  • Learning & Education – Step-by-step explanations, quizzes, and knowledge testing.
  • Custom Prompt Builder – Users can save and reuse their own prompt configurations.

We Used

Technical Architecture

01

Frontend:

React.js and responsive UI.

02

Backend:

.net core.

03

AI Integration Layer:

Custom middleware to manage requests to multiple AI providers with authentication and load balancing.

04

Database

PostgreSQL for user data, MongoDB for chat logs.

05

Payments & Subscriptions

Stripe

06

Hosting

Deployed on Azure with auto-scaling and high availability.

Techstern

Working experience

  • Cost Savings: Users save up to 70% compared to buying individual subscriptions for each AI provider.
  • Higher Engagement: Predefined prompts increased AI adoption among non-technical users by 45%.
  • Scalability: Architecture supports tens of thousands of concurrent users without degradation in response times.

By building this AI subscription super-app, our client has positioned themselves as a disruptor in the AI market —

  • offering premium AI at an affordable price.
  • This project demonstrates our expertise in:
  • AI API integrations across multiple providers.
  • Scalable subscription platforms with intelligent cost management.
  • User experience design for both technical and non-technical audiences.