How come Claude Opus 4.5 is set at the price of Claude Sonnet 4.5 when it is said to be one third the cost?

Pricing for Claude Opus 4.5

neverinfamous (Chris LeRoux) November 25, 2025, 11:58am 3

Ahh, I see. But, Opus 4.1 was 3x the cost of Sonnet 4.5? That seems a bit unlikely.

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