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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
—
2886.0
Jun 2026
Claude Sonnet 5
CLOSED
—
succeeds Claude Fable 5
-532.7
2353.3
Jul 2026
Claude Opus 5
CLOSED
—
succeeds Claude Sonnet 5
+587.7
2941.0
Sep 2026
Claude Fable 5.1
CLOSED
—
succeeds Claude Opus 5
+56.4
2997.4
Sep 2026
Claude Mythos 5.1
CLOSED
—
succeeds Claude Opus 5
3289.0