Anthropic releases Claude Opus 4.1
Anthropic released Claude Opus 4.1 with improved agentic tasks, coding and research performance through the API, Claude and major cloud platforms.
TOWARD DOOM47confidence 94/100
Why it moved the index
A stronger exact frontier checkpoint improved released coding, research and agentic performance while retaining broad commercial access.
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AUDIT TRAIL
Assessment history
- R1Toward 47 · confidence 94
New exact August 2025 model release with API identity claude-opus-4-1-20250805 and no durable collision.
12 Aug 2026