Anthropic Unveils Claude 4 Sonnet on Amazon Bedrock, Superseding Claude 3.5

Sep 12, 2025
Amazon Web Services
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Summary

Anthropic releases Claude 4 Sonnet on Amazon Bedrock, superseding Claude 3.5, boasting increased context window, native reasoning mechanisms, and advanced tool use capabilities, requiring developers to update API calls, prompts, and application logic for compatibility.

Key Points

  • Anthropic's Claude 4 Sonnet model launches on Amazon Bedrock, replacing the deprecated Claude 3.5 Sonnet
  • Key differences include increased context window, native reasoning mechanisms, and advanced tool use capabilities
  • Developers must update API calls, prompts, and application logic to leverage new features and ensure compatibility

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