Build Your Own CAPTCHA Recognition or Use a CAPTCHA Solving Service? An Architecture Selection Guide from Open-Source OCR and LLM Calls to Enterprise

Faced with diverse web CAPTCHAs, technical teams often waver between local open-source OCR, multimodal large models, and third-party CAPTCHA solving services. This article deeply analyzes the hidden maintenance costs and applicable boundaries of these three solutions, reveals why Token-based behavioral verification must rely on professional APIs, and provides a practical guide for smooth, low-risk integration and traffic migration to CAPTCHA solving services.