Unverified50% confidenceEventExact time
Opus 5.5 was released on September 22, Sonnet 5.5 was released on September 28, and Haiku 5.5 was released on October 7.
1
Sources
50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedClaude Haiku 5.5 was officially released on October 7, 2026.65% similarUnverifiedAccording to leaked information, Claude Sonnet 5.5 will most likely be officially released at 2 p.m. US time on Tuesday.62% similarUnverifiedOpus 5.5 is a new-generation model released by Anthropic in September.61% similarUnverifiedOpus 4.5于11月发布，4.6于2月发布，4.7也已发布58% similarUnverifiedThe Claude 5.5 series includes three models—Opus 5.5, Sonnet 5.5, and Haiku 5.5—positioned as flagship, general-purpose, and lightweight respectively.57% similar
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