Anthropic: Claude Opus 5 Knowledge Cutoff (2026-05-31)
Claude Opus 5's knowledge cutoff is 2026-05-31, which was 156 days ago. Its freshness score is 93 out of 100.
Data sourced from OpenRouter API and manual data collection | Last updated: Nov 3, 2026, 8:01 AM UTC
Knowledge cutoff
2026-05-31
Freshness score
93
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Frequently asked questions
When is the knowledge cutoff for Anthropic: Claude Opus 5?
Claude Opus 5's knowledge cutoff is 2026-05-31, which was 156 days ago. Its freshness score is 93 out of 100.
What can Claude Opus 5 know after its knowledge cutoff?
Claude Opus 5 stopped learning from its training data on 2026-05-31. It cannot know about world events, news, or new technologies that happened after that date.