Claude Model Family

Haiku, Sonnet, and Opus — what each model is designed for, where it excels, and the capability differences that matter in practice.

What You Will Learn

• The three tiers: Haiku (fast/cheap), Sonnet (balanced), Opus (most capable)
• What tasks benefit from each tier
• How model capability maps to token throughput and cost
• Current model IDs and their release dates
• When Sonnet is the right default choice