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Claude 3 OpusvsClaude Opus 4.5

Comparing across 11 challenges

2 Models Selected
Comparison Active
Claude 3 Opus

Claude 3 Opus

anthropicMar 2024
A
Not disclosed
200,000k
xlarge
conversationreasoningcode generation+1
Claude Opus 4.5

Claude Opus 4.5

anthropicNov 2025
B
xlarge
conversationreasoningcode generation+2

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