CANONICAL HISTORY
Claude Fable 5.1 Release
Anthropic announced Claude Fable 5.1 on September 1, 2026. Anthropic's release announcement states that Fable 5.1 was generally available and documents the Claude API identifier claude-fable-5-1.
Evidence / resource
This page preserves the public LINEAiGE record and its first-party source relationship.
Record identity
LINEAiGE IDclaude-fable-5-1-release-2026