Anthropic: Claude Opus 4.1 Release Date
Claude Opus 4.1 was released on 2025-08-05, which was 455 days ago. Its recency score is 79.
Data sourced from OpenRouter API and manual data collection | Last updated: Nov 3, 2026, 8:01 AM UTC
Release date
2025-08-05
Recency score
79
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Frequently asked questions
When was Claude Opus 4.1 released?
Claude Opus 4.1 was released on 2025-08-05, which was 455 days ago. Its recency score is 79.