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Sonnet 4.5 is reportedly set to become unavailable on AWS Bedrock on April 8, 2027
A user lists October 8, 2026, for legacy status and January 8, 2027, for extended access.
TLDR
A user posted an AWS Bedrock deprecation schedule for Sonnet 4.5: legacy status began October 8, 2026, and extended access is set to begin January 8, 2027. The user says the model will become unavailable on April 8, 2027, when requests to its model ID will fail.
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