Anthropic Recommends Claude Opus 5.5 as the Default for Daily Knowledge Work

At a glance

Anthropic made Claude Opus 5.5 the default model on Pro, Max, Ultra, and Team plans. It recommends the model for research, analysis, and writing, saying a stronger model can finish tasks with less work and offset its higher price.

Key points

1. 1

   Anthropic suggests using Opus 5.5 for research, analysis, and reports, decks, and spreadsheets.

2. 2

   Haiku 5.5 is for quick, simple lookups, and Sonnet 5.5 is for tasks with a clear brief.

3. 3

   Fable 5.2 is for the most demanding multi-step research and large coding projects.

4. 4

   Anthropic says Opus 5.5 follows instructions closely and handles figures and sources carefully, so its output needs less editing.

Why it matters

Which AI model a team uses by default affects both how fast work gets done and how much it costs.