Claude Code changelog account (@ClaudeCodeLog) said 2.1.280 shipped with 114 CLI changes. The official CHANGELOG adds Claude Opus 5.5 (claude-opus-5-5) as the default Opus model with a 1M context window and API pricing of $4/$20 per million tokens plus $0.20/MTok cache reads. Auto mode also denies once on declined safety reviews and backs off on silent checks to avoid retry loops.

Key Takeaways

  • ✓Default Opus model is now Claude Opus 5.5 (claude-opus-5-5) with 1M context.
  • ✓API pricing $4/$20 per MTok; cache reads $0.20/MTok.
  • ✓Auto mode denies once on declined safety reviews and backs off on silent checks.
Claude Code 2.1.280: default Opus is Opus 5.5 (1M context) at $4/$20 per MTok
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