Claude Code
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