Claude Opus 4.8 vs Claude Sonnet 5.5

Anthropic Claude Claude Opus 4.8Anthropic Claude Claude Sonnet 5.5
VendorAnthropic ClaudeAnthropic Claude
Context window1,000,0001,000,000
Max output128,000128,000
ReasoningYesYes
Tool callingYesYes
File inputYesYes
Inputtext, image, filetext, image, file
Outputtexttext
Released2026-05-282026-09-28