The Claude 4.5 family offers three tiers:
Claude Opus 4.5 is Anthropic's most capable model, particularly strong for coding, agents, and computer use. It is designed for the hardest tasks where quality and reliability matter most.
Claude Sonnet 4.5 balances capability and efficiency. It is often a good default for production applications that need strong performance without using the most heavyweight model for every step.
Claude Haiku 4.5 is optimised for speed. It can be a good choice for lightweight assistants and higher-volume steps when paired with appropriate validation.
All models support hybrid reasoning, offering instant responses or extended thinking based on task complexity.