OpenAI GPT APIs

The industry standard for integrating frontier LLMs like GPT-4o into applications via a high-performance REST API.

OpenAI GPT APIs provide programmatic access to advanced models including GPT-4o and GPT-3.5 Turbo. Developers use these endpoints to automate complex reasoning, generate structured JSON output, and build conversational agents with low latency. The platform supports sophisticated features like function calling for tool integration, fine-tuning for domain-specific accuracy, and vision capabilities for multimodal processing. With robust SDKs for Python and Node.js, it remains the primary infrastructure for scaling AI-driven features from initial prototype to production-grade deployment.

https://platform.openai.com/docs/guides/text-generation