Anthropic releases Claude Opus 4.1
Claude Opus 4.1 released — an upgrade to Opus 4 on agentic tasks, real-world coding and reasoning
Why it matters
Company-reported 74.5% on SWE-bench Verified; priced the same as Opus 4, with Anthropic recommending the upgrade for all uses
Source — Primary sources first; secondary reports are labelled “Press”
Officialanthropic.comhttps://www.anthropic.com/news/claude-opus-4-1Added in Week 41, 2026 · See that week