Anthropic: Claude Opus 5.5 Knowledge Cutoff (2026-06-30)
Claude Opus 5.5's knowledge cutoff is 2026-06-30, which was 126 days ago. Its freshness score is 94 out of 100.
Data sourced from OpenRouter API and manual data collection | Last updated: Nov 3, 2026, 8:01 AM UTC
Knowledge cutoff
2026-06-30
Freshness score
94
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Frequently asked questions
When is the knowledge cutoff for Anthropic: Claude Opus 5.5?
Claude Opus 5.5's knowledge cutoff is 2026-06-30, which was 126 days ago. Its freshness score is 94 out of 100.
What can Claude Opus 5.5 know after its knowledge cutoff?
Claude Opus 5.5 stopped learning from its training data on 2026-06-30. It cannot know about world events, news, or new technologies that happened after that date.