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Family
Light
Anthropic
Claude 5 family
5 releases · Elo progression and succession lineage (D9)
Elo progression
Jun 2026
Claude Fable 5
CLOSED
—
2928.6
Jun 2026
Claude Sonnet 5
CLOSED
—
succeeds Claude Fable 5
-508.2
2420.4
Jul 2026
Claude Opus 5
CLOSED
—
3078.5
Sep 2026
Claude Fable 5.1
CLOSED
—
succeeds Claude Fable 5
+215.6
3144.2
Sep 2026
Claude Mythos 5.1
CLOSED
—
3523.3