Claude Opus 5.5 is now the default model on Pro, Max, Ultra, and Team plans, offering enhanced capabilities for research, analysis, and document production.

Claude Opus 5.5 has been designated as the default model for users on Pro, Max, Ultra, and Team plans, according to an announcement published on November 12, 2026. The model is recommended for daily knowledge work, including research, analysis, and the production of documents, spreadsheets, and presentations. Its enhanced capabilities are designed to streamline workflows by completing tasks with greater precision and efficiency.

Claude Opus 5.5 is positioned as the optimal choice for most knowledge work, offering a balance between cost and performance. It is priced at $4 per million input tokens and $20 per million output tokens, with a moderate processing speed. By comparison, the lower-cost Claude Haiku 5.5 ($0.10/$0.50 per million tokens) is suited for quick lookups and high-volume tasks, while Claude Sonnet 5.5 ($2/$10 per million tokens) excels in well-scoped tasks requiring polished outputs. For the most complex technical work, Claude Fable 5.2 ($8/$40 per million tokens) is recommended.

Opus 5.5 stands out for its ability to handle complex tasks requiring judgment, such as financial analysis, research, and creating detailed documents and presentations. It follows instructions precisely, minimizes errors, and produces outputs that often require little to no editing. In internal tests, Opus 5.5 successfully completed 16 out of 18 reports on a company's quarterly performance without inventing figures or quotes, demonstrating its reliability and accuracy.

5 has shown significant improvements over its predecessor, Opus 5, in both speed and cost-effectiveness.

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