quinn xen (@Quinn_Sheng) 在 Anthropic 官方开始处理这个问题了:Elevated errors: Invalid `signature` in `thinking` block 中发帖
链接在这
官方临时解决方案就给了不要混着用 emmm
A mitigation is to not mix Claude API traffic between Bedrock, Vertex, and api.anthropic.com. Each platform is fully operational independently.