Anthropic's guidance: start with Opus for large projects; max-effort Sonnet loses its balance
ClaudeDevs · x · 2026-09-29
Anthropic offers model-selection guidance: start with Opus for large projects and use Sonnet when balancing quality with speed and cost. Claude apps default to medium effort while the Platform runs at high. Notably, cranking Sonnet to max effort loses the balance—and you may want to consider Opus instead.
Related event: Anthropic Launches Claude Sonnet 5.5: Over 30% Faster, Up to 30% Cheaper(58 posts)→
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