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On Openrouter it has the same cost per token as 4.5
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You missed my point. If the average request uses more tokens than 4.5, then you will pay more sending those requests to 4.6 than 4.5.

Imagine 2 models where when asking a yes or no question the first model just outputs a single yes or no then but the second model outputs a 10 page essay and then either yes or no. They could have the same price per token but ultimately one will be cheaper to ask questions to.

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> From the press release at least it sounds more expensive than Opus 4.5 (more tokens per request and fees for going over 200k context).

That's a feature. You could also not use the extra context, and the price would be the same.

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The model influences how many tokens it uses for a problem. As an extreme example if it wanted it could fill up the entire context each time just to make you pay more. The efficiency that model can answer without generating a ton of tokens influences the price you will be spending on inference.
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