OpenAI 价格变动

原始标题：OpenAI o4-mini pricing page restructured; MCP section renamed

原文摘要：The o4-mini pricing table was reorganized: the 'MCP and Connectors' section is now 'MCP servers', and per-token input/cached/output prices ($4.00/$1.00/$16.00, and $2.00/$0.50/$8.00 with data sharing) were removed from the diff view. No confirmed price change for o4-mini itself.