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Claude Sonnet 4.5vsClaude Opus 4.5

Comparing across 27 challenges

2 Models Selected
Comparison Active
Claude Sonnet 4.5

Claude Sonnet 4.5

anthropicSep 2025
A
200,000k
large
conversationreasoningcode generation+2
Claude Opus 4.5

Claude Opus 4.5

anthropicNov 2025
B
xlarge
conversationreasoningcode generation+2

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