Category: OpenAI API Guides
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OpenAI Responses API Migration Guide: Replace Chat Completions and Assistants Safely
Last reviewed: August 30, 2026. API interfaces and product settings change; verify current official documentation before production deployment. A Responses API migration is an application-architecture change, not a search-and-replace operation. Request fields, output items, conversation state, tool calls, streaming events, storage, and compatibility boundaries all need explicit tests before old endpoints are removed. In this…
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OpenAI API Quickstart for Backend Developers: From First Request to Production
Follow this OpenAI API quickstart from a first Responses API request to secure environment setup, validation, retries, monitoring, and production deployment.
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OpenAI API Key Not Working? How to Fix 401 and Incorrect API Key Errors
Fix OpenAI API key not working and 401 authentication errors by checking credentials, Base URL, environment variables, project access, and key rotation.