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ModelActiveProprietary

claude-fable-5-1-xhigh

Anthropic

quality44

Updated 4 h ago · first seen 11 Sept 2026

model_01M29A5BHD9Q5SE5T77WN03F9R

Context
1M tokens
T2 · 4 h ago

As of

Rewind the record: see this entity's attributes exactly as AI Atlas knew them on a given day.

Claim history · Context window

1 claims · 1 propertiesShow all properties

Context windowcontext_length1

Claim history for Context window
ValueValid from → toStatusSourceConfidenceExtractor
1M tokenscurrentcurrentArtificial AnalysisT2mediumdeterministic

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →