Anthropic researcher's haiku hints Claude Haiku is jumping from 4.5 to 5.5
edwinarbus · x · 2026-10-08
Anthropic researcher Edwin Arbus posted a haiku: "Haiku took its time, four point five to five point five. Worth the wait, we hope." — widely read as a signal that Claude Haiku will skip 5.0 and jump straight to version 5.5, implying a major capability upgrade is imminent.
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