Claude Sonnet 5.5
Anthropic · 5 thinking configurations
Intelligence—
Input / 1M$2.00
Output / 1M$10.00
Context1M
Tariff: Anthropic · Source: artificial-analysis · USD per million tokens
Thinking configuration
What does more thinking buy you?
Compare this model’s measured thinking configurations.
Scroll the chart ↔ · tap a point for details
Efficient frontier: best measured score at each cost4 measured configurations · 1 without both values
Selected: thinking low · Click a point to switch configuration
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Humanity’s Last ExamDifficult questions across many disciplines, compared under the same evaluation setup.
36.2 %SciCodeCode generation for scientific research problems.
49.1 %Omniscience accuracyFactual accuracy in Artificial Analysis's Omniscience evaluation.
46.3 %Specifications from the catalog
Inputtext, image, file
Outputtext
Tool callingYes
Structured outputYes
Speed84.0 tok/s
First token1.11 s
Maximum output128K
Catalog listing date2026-09-28