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ModelActiveProprietaryfamily · Claude

Claude Opus 4.5

Anthropic

Updated 29 min ago · first seen 11 Sept 2026

model_01M293VBD8J8KGJNJGF7K9NQVD

Specification

Family
Claude

Source:Claude Developer Platform docsT1observed 29 min agohigh

Status
active

Source:Claude Developer Platform docsT1observed 29 min agohigh

Openness
proprietary

Source:Claude Developer Platform docsT1observed 29 min agohigh

Retirement date
24 Nov 2026

Source:Claude Developer Platform docsT1observed 29 min agohigh

Retirement tentative
Yes

Source:Claude Developer Platform docsT1observed 29 min agohigh

Each value shows its source, tier and observation time. Conflicting claims are kept side by side and flagged — never averaged. How AI Atlas records facts →

Provenance

Attributed facts

5

Source tiers

T15

Freshest observation

29 min ago

Conflicts

None