Post
The New Stack
thenewstack.io
did:plc:kfaqksbyr3zwzvzj3wpbpvac
Claude Opus 5.5 costs less than Opus 5, but four breaking changes to thinking, tool use and computer use can trigger 400 errors in existing AI agents.
https://bit.ly/3TdA48V
2026-09-28T17:30:26.359Z