$ man model-selection
Engineering · AI Agents
Model Selection
Choosing which AI model to use based on task complexity and cost.
by Shawn Tenam
por qué importa
Opus is smarter but expensive. Sonnet is fast and cheap. For simple tasks (reformatting, scanning), use Sonnet. For complex reasoning (architecting, debugging), use Opus. Wrong model = wasted money or bad output.
cómo lo usas
The daily tracker logs model usage. Opus sessions cost $12-15. Sonnet sessions cost $3-5. Track your spend. Optimize your model picks. Don't use Opus to count words.
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