Expired50% confidenceEventExact time
According to leaker Lira, Claude Sonnet 5.5 has been secretly tested within a partner scope with 24-hour access granted, and Haiku 5.5 is expected to be released simultaneously with Sonnet 5.5.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
9/30/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/14/2026(expired)
Sources
Related Entities
Related Claims
VerifiedAnthropic stated that Sonnet 5.5 and Haiku 5.5 are coming soon.75% similarUnverifiedSonnet 5.5 has been available on all platforms since its launch date and is immediately accessible to users72% similarUnverifiedSonnet 5.5 is on par with Opus 5.5 in offensive and defensive cybersecurity capabilities, making it the first model in the Sonnet series to adopt equivalent cybersecurity protection mechanisms.71% similarUnverifiedA similar Sonnet 5 leak (codenamed Phoenix) appeared in February of this year, but the model that was ultimately officially released was Sonnet 4.6, not Sonnet 5.70% similarUnverifiedClaude Sonnet 5.5 has officially launched on the Databricks platform, covering all three major cloud environments: AWS, Azure, and GCP.69% similar
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