Claude Opus 5.5 and Sonnet 5.5 Everywhere
Claude Opus 5.5 and Sonnet 5.5 replace Opus 5 and Sonnet 5 across every AI surface — Zyan AI, Builder, ads, drafts and the terminal — and Opus 4.8 leaves the pickers. GPT-6 Sol moves to OpenAI’s Responses API, so tool calls keep their reasoning.
- One shared last-used model for the ads and budget agents
- An interrupted agent turn is billed at its measured cost
- OpenAI refusals name the field they rejected
