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Claude Knowledge Cutoff (2026-06-30)

Anthropic's newest knowledge cutoff is , on Claude Opus 5.5.

Anthropic has 14 AI models in this database. The oldest cutoff is Claude Opus 4.1 on .

Data sourced from OpenRouter API and manual data collection | Last updated: Nov 3, 2026, 8:01 AM UTC

2026 Knowledge Cutoff AI Models

Model NameKnowledge CutoffFreshness Score
Anthropic: Claude Fable 5.1
2026-06-30
94
Anthropic: Claude Opus 5.5
2026-06-30
94
Anthropic: Claude Sonnet 5.5
2026-06-30
94
Anthropic: Claude Opus 5
2026-05-31
93
Anthropic: Claude Fable 5
2026-01-31
87
Anthropic: Claude Opus 4.7
2026-01-31
87
Anthropic: Claude Opus 4.8
2026-01-31
87
Anthropic: Claude Sonnet 5
2026-01-31
87

2025 Knowledge Cutoff AI Models

Model NameKnowledge CutoffFreshness Score
Anthropic: Claude Opus 4.5
2025-05-31
76
Anthropic: Claude Opus 4.6
2025-05-31
76
Anthropic: Claude Sonnet 4.6
2025-05-31
76
Anthropic: Claude Haiku 4.5
2025-02-28
71
Anthropic: Claude Opus 4.1
2025-01-31
70
Anthropic: Claude Sonnet 4.5
2025-01-31
70

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Frequently asked questions

What is the Claude knowledge cutoff?

Anthropic's newest knowledge cutoff is 2026-06-30, on Claude Opus 5.5.

Which Anthropic model has the newest knowledge cutoff?

Claude Opus 5.5 has Anthropic's newest knowledge cutoff, 2026-06-30.