Official Anthropic CLI for Claude. Features Sonnet 4.6, Opus 4.8, and Haiku 4.5. Extended thinking modes (think, megathink, ultrathink) for complex reasoning.

Supported Models

Claude Sonnet 4.6Claude Opus 4.8Claude Haiku 4.5

Key Features

  • Extended thinking
  • Think/Megathink/Ultrathink
  • Official Anthropic

Pros

  • Official Anthropic tool
  • Extended thinking modes
  • Best Claude access

Cons

  • Expensive paid tiers
  • Limited free tier
  • Weekly limits

Best Use Cases

Complex reasoningAnthropic ecosystemResearch