Unverified50% confidenceEventExact time
Claude Sonnet 4.5 will be retired on November 30.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/18/2026
First Seen
Valid until: 1/16/2027
Sources
Related Entities
Related Claims
UnverifiedOpus 5.5 was released on September 22, Sonnet 5.5 was released on September 28, and Haiku 5.5 was released on October 7.63% similarUnverifiedClaude Sonnet 4 is a mid-tier model released by Anthropic in mid-2025, with a score on SWE-bench that significantly leads models of the same tier62% similarUnverifiedClaude Sonnet 3.7 was released by Anthropic in early 2025 and achieved the highest score at the time on the SWE-bench coding benchmark.61% similar
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