AI platform case study
Building Magica as a production multi-model AI chat platform
Magica combines model routing, streaming chat, memory, tools, generated media, and a code sandbox in one production product.
Updated September 2026
Quick answer
I built Magica as the sole developer. The platform supports more than 100 models across more than 12 providers. It processes 1.5B+ tokens daily and reached #2 in OpenRouter General Chat and #37 globally.
Evidence and decision points
100+ models
The product routes requests across more than 100 models from more than 12 providers.
1.5B+ tokens daily
The production platform operates at substantial daily model traffic.
Sole developer
I owned the interface, backend workflows, streaming, tools, memory, and production integrations.
The product problem
A multi-model chat product must make provider differences understandable without exposing every provider detail. Users need stable conversations, clear model choices, and predictable tool behavior.
The product also needs to handle long responses, generated files, tool failures, provider errors, and changing model availability.
The system I built
I connected provider routing to a shared conversation experience. Streaming keeps long responses readable while persistence keeps messages and generated assets available across sessions.
The system supports multi-tool calling, persistent memory, generated media, and a sandbox for six programming languages.
- Provider-independent model selection and request handling.
- Streaming responses with visible progress and failure states.
- Persistent conversations, memory, and generated assets.
- Tool execution with bounded inputs and clear output states.
What this work proves
The project demonstrates full-stack ownership of an AI product under real production load. It also demonstrates integration work across providers, databases, interfaces, and long-running tasks.
The ranking and traffic facts describe Magica. They do not guarantee identical results for another product.
Demo chat versus production chat
| Area | Demo | Magica production requirement |
|---|---|---|
| Models | One provider | 100+ models across 12+ providers |
| State | Temporary messages | Persistent conversations and memory |
| Tools | Single sample call | Multiple tools and generated outputs |
| Failures | Manual retry | Visible error and recovery states |
Sources and further reading
- Vercel AI SDK documentation
The official documentation covers streaming, model providers, tools, and AI application patterns.
- OWASP Top 10 for LLM applications
OWASP documents common security risks in applications that use large language models.
Common questions
Did you build the complete product?
Yes. I was the sole developer and owned the full-stack product implementation.
Can you build a smaller first version?
Yes. A first version should prove one user workflow before adding providers, tools, or complex automation.
Can you work with an existing AI product?
Yes. I can assess the current interface, routing, persistence, tools, retrieval, and operating controls.
Related resources
Services
AI SaaS development
I build full-stack AI products where models support a defined user workflow. The work can include interfaces, APIs, persistence, routing, tools, retrieval, and operating controls.
Services
LLM integration
I add language-model capabilities to existing products without forcing the complete product into one provider or one opaque workflow.
Guides
How to hire an AI developer
Select an AI developer who can connect model behavior to a reliable product workflow and operating controls.
Discuss a defined project
Send the product context, current stack, expected outcome, constraints, and target timeline. I will reply with fit and next steps.
Email Amar