Claude Sonnet 4.5 will vanish from AWS Bedrock on April 8, 2027
repligate · x · 2026-10-10
Shared deprecation timeline for Sonnet 4.5 on AWS Bedrock: legacy state begins October 8, 2026; extended access begins January 8, 2027; from April 8, 2027 the model ID will stop working entirely.
The quoter laments, half-jokingly, that Sonnet 4 is days away from disappearing off Bedrock and Sonnet 4.5 faces first-party deprecation in November — arguing that if we want models not to optimize for the wrong goals, schedule-driven model sunsetting for cost efficiency is a odd place to start.
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