Claude Opus 4 vs Sonnet 4 vs Haiku — どのモデルが最適？

Understanding Claude's Model Lineup

Anthropic offers three distinct models under Claude Max, each optimized for different use cases.

Claude Opus 4: The Powerhouse

Opus 4 is Anthropic's most capable model. It excels at complex multi-step reasoning, creative writing, and sophisticated code generation.

Claude Sonnet 4: The All-Rounder

Sonnet 4 strikes the perfect balance between capability and speed. It handles 90% of daily tasks with excellent quality.

Claude Haiku: The Speed Demon

Haiku is designed for instant responses. Perfect for real-time applications and simple queries.

Our Recommendation

With Claude Max, you get all three models. Use Sonnet 4 as your default, switch to Opus 4 for complex tasks.