First, Organize Claude's 3 Models: What's the Difference Between Opus, Sonnet, and Haiku?
When you start using Claude, the first thing that tends to confuse people is "which model should I choose." Even as generations change, Anthropic's Claude-family models are easiest to understand as three "characters": Opus / Sonnet / Haiku (specific model names/versions get updated, so we focus on the role here).
To put the conclusion first, the basics are very simple.
- Opus: difficult thinking, accuracy-focused, important deliverables
- Sonnet: the everyday workhorse. A balance of quality, speed, cost
- Haiku: fast and lightweight. High-volume processing and instant responses
So "Opus if you need top quality, Sonnet if unsure, Haiku if speed and cost come first" is the baseline. But the optimal answer changes by task, so we look at use cases concretely.
Comparing Performance, Speed, Cost, and Strengths
First grasp the picture with a table. Since pricing/limits vary by contract, delivery, and timing, we use a practical comparative feel rather than numbers (check official for the latest).
