Claude Opus 5.5 : The model-ID swap that 400s your production agents
中文摘要
仅切换 ID 至 Claude Opus 5.5 并非迁移；其强制工具使用等架构变化会导致生产代理出现 400 错误。
English Summary
Simply changing the ID to Claude Opus 5.5 isn't a seamless migration; architectural shifts like forced tool use can cause 400 errors in production agents.
Original Excerpt
Changing the string to claude-opus-5-5 is not a migration — thinking always-on, forced tool use, bound thinking blocks, and the old… Continue reading on Medium »