OpenAI for Developers in 2025

What this post added

This post details the 2025 evolution of OpenAI's agent capabilities, focusing on the shift to agent-native APIs and improved models. Key contributions include the Responses API for multi-modal inputs/outputs and reasoning controls, the Agents SDK and AgentKit for easier agent orchestration, and enhanced state management with Conversation State and Connectors. It also highlights the maturation of integrated tools (web search, file search, Code Interpreter, computer use) and platform features for scaling and reliability, such as prompt caching, background mode, and webhooks, all contributing to more robust production-grade agent development.