OpenAI API is a powerful tool for developers seeking to integrate artificial intelligence (AI) into their applications. This guide will walk you through the essentials of using OpenAI 's API , focusing on its practical applications and real-world use cases. Learn how to use OpenAI API with our complete beginner's guide. Step-by-step tutorial covering setup, API calls, pricing, models (GPT-4, DALL-E), and best practices for businesses. API Model Availability by Usage Tier and Verification Status See which OpenAI models you can access based on your usage tier and verification status, and where to check your current level. Learn how to integrate the OpenAI API in Python within 15 minutes. Includes setup, environment configuration, example scripts, and production-ready best practices.