Pragmatic AI Stack

A comprehensive learning platform for AI development with curated guides for FastAPI, LangChain, Pydantic, and more

Explore Components Start Learning

Core AI Stack

Carefully curated components that work together to build modern AI applications

Pydantic

Data validation using Python type hints

Beginner

Key Strengths:

Type-safe data validation
Excellent performance
JSON Schema generation

v2.5.0

Docs Guide →

SQLAlchemy

Python SQL toolkit and Object Relational Mapping library

Advanced

Key Strengths:

Mature and feature-rich
Excellent performance
Flexible architecture

v2.0.0

Docs Guide →

LangChain

Framework for developing applications powered by language models

Intermediate

Key Strengths:

Comprehensive LLM integration
Chain and agent abstractions
Large ecosystem of integrations

v0.1.0

Docs Guide →

LiteLLM

Unified interface for 100+ LLMs

Intermediate

Key Strengths:

Unified API for multiple LLM providers
Cost optimization features
Fallback and retry mechanisms

v1.0.0

Docs Guide →

Helicone

Open-source observability platform for LLM applications

Beginner

Key Strengths:

LLM-specific monitoring
Cost tracking and optimization
Request/response logging

v3.0.0

Docs Guide →

FastAPI

Modern, fast web framework for building APIs with Python

Intermediate

Key Strengths:

High performance (comparable to NodeJS and Go)
Automatic API documentation generation
Built-in type validation with Pydantic

v0.104.1

Docs Guide →

View All Components

Everything You Need

From beginner guides to advanced patterns, we've got you covered

Comprehensive Guides

Detailed documentation for each component with examples and best practices

Step-by-Step Tutorials

Learn by building real projects with our hands-on tutorials

Ready-to-Use Templates

Jump-start your projects with our curated templates and boilerplates

Alternative Comparisons

Make informed decisions with detailed comparisons of alternative tools

Latest Updates

Stay up to date with the latest guides, tutorials, and stack updates

Tutorials

Building Your First AI API with FastAPI and LangChain

Learn how to create a simple AI-powered API using FastAPI and LangChain with step-by-step instructions

Beginner

Templates

FastAPI Starter Template

A complete FastAPI starter template with authentication, database integration, and best practices

Intermediate

Templates

LangChain RAG Application Template

A complete Retrieval-Augmented Generation (RAG) application template using LangChain, FastAPI, and vector databases

Intermediate

Tutorials

Mastering Data Validation with Pydantic

Learn how to use Pydantic for robust data validation, serialization, and API development

Beginner

Tutorials

Multi-Provider LLM Integration with LiteLLM

Learn how to use LiteLLM to integrate multiple LLM providers with fallbacks, cost optimization, and unified APIs

Intermediate

Tutorials

Database Integration with SQLAlchemy

Learn how to use SQLAlchemy for database operations, relationships, and migrations in Python applications

Intermediate

Ready to Build?

Start building your AI application with our curated stack and comprehensive guides

Start Tutorial Browse Templates