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Changelog Update

Sep 29, 2025
Anthropic/Claude APIAPI
  • We've launched Claude Sonnet 4.5, our best model for complex agents and coding, with the highest intelligence across most tasks. Learn more in What's new in Claude 4.5.
  • We've introduced global endpoint pricing for AWS Bedrock and Google Vertex AI. The Claude API (1P) pricing is unaffected.
  • We've introduced a new stop reason model_context_window_exceeded that allows you to request the maximum possible tokens without calculating input size. Learn more in our handling stop reasons documentation.
  • We've launched the memory tool in beta, enabling Claude to store and consult information across conversations. Learn more in our memory tool documentation.
  • We've launched context editing in beta, providing strategies to automatically manage conversation context. The initial release supports clearing older tool results and calls when approaching token limits. Learn more in our context editing documentation.