Product
Claude Opus 5.5 joins the model picker.
Anthropic's newest Opus is live in Morrison Chat and automations, for long, multi-step analysis and writing. Opus 5 moves to Older models, and the picker's cost indicator gains a fourth step.
Mads Rued Schleicher, Ulrich Svarrer and Thomas Bogh
3 min readUpdated
Updated November 13, 2026: Claude Opus 5.5 is still in the picker. Claude Fable 5.2 has since replaced Fable 5.1 at the top, and Claude Sonnet 5.5 is the default for new chats.
Claude Opus 5.5is live in Morrison. It is Anthropic’s newest Opus, and it takes Opus 5’s place in the model picker. Same Skills, same integrations, same crawl. Pick it for a single message, a whole chat or an automation.
What it is for
The picker describes Opus 5.5 as the leading Opus for long, multi-step work. In Morrison, that means the runs with many steps: a cannibalization review across a whole section, an audit that reads Search Console and GA4 side by side before it writes a word, a monthly report an automation puts together on its own.
It sits between the everyday default and the flagship. More depth than Claude Sonnet 5 on the hard questions, at a lower cost tier than Claude Fable 5.1.
A fourth cost tier
The cost indicator next to each model now runs from $ to $$$$. The two flagships, Claude Fable 5.1 and GPT-6 Astra, move up to the new top step. Opus 5.5 sits at $$$. Hover any model in the picker to see its tier and a one-line description.
Opus 5 moves to Older models
Opus 5 is still there, in the Older models menu at the bottom of the picker, alongside the rest of the previous generations.
Try it
Open a chat, click the model name next to the send button and choose Claude Opus 5.5. Hand it the question you would want a second opinion on. More on how the picker works on the Chat page. Available on every paid plan. The free trial includes Claude Sonnet 5.5, Claude Haiku 5.5 and Gemini 3.8 Flash.
Tell us where it earns its place at hello@morrison.app.