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Claude Opus 4.1vsClaude Sonnet 4.5

Comparing across 5 challenges

2 Models Selected
Comparison Active
Claude Opus 4.1

Claude Opus 4.1

anthropicAug 2025
A
Not disclosed
200,000k
xlarge
conversationreasoningcode generation+3
Claude Sonnet 4.5

Claude Sonnet 4.5

anthropicSep 2025
B
200,000k
large
conversationreasoningcode generation+2

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