Claude

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Claude

News analysisEvent: September 28, 2026Published: October 3, 20263 min read

Claude Sonnet 5.5: model upgrades require release controls

Anthropic released Claude Sonnet 5.5 on September 28. Its arrival is a reminder to treat model upgrades as measurable, reversible application changes.

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Claude

Claude Sonnet 5.5: model upgrades require release controls

Evaluate theRangoon architecture.

Evaluate the
Rangoon architecture.