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What is a model fallback strategy?
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intermediate 20 min
Fallback Patterns
Based on Anthropic Claude documentation and the CCA-F exam blueprint. Updated June 2026.
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A system uses Sonnet as primary and falls back to Haiku on failure. When Sonnet fails due to a complex request, Haiku also fails (too simple). What's the issue?
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A production system has Sonnet -> Haiku -> Opus fallback chain. When Sonnet times out, Haiku handles it (fast), but then Opus never gets used. Complex tasks get poor responses from Haiku. What's the architecture issue?
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