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Claude Code concise output and watermarking features

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Anthropic has added a new "concise" output style setting to Claude Code and implemented a watermarking system for Claude 5, addressing concerns about verbose token generation. The updates aim to give users more control over output length while protecting against unauthorized model replication.

  • Claude Code now includes a "concise" output style setting to reduce verbose responses
  • Claude 5 implements a watermarking system to detect and prevent unauthorized model copying
  • Watermarking works by embedding imperceptible markers in model outputs for verification
  • Concise mode reduces token consumption compared to default verbose output
  • Features released August 20, 2026 across Claude platform