Following up on my own caveat above, on the day it was meant to bite: the increase did not happen.
Anthropic cancelled it. Their pricing page now carries a note saying the $2/$10 announced at launch as introductory through 31 August is the standard price, and that the scheduled move to $3/$15 "will not occur". So every dollar figure in this post stands unchanged. $0.351 per run, $10,534 a month, $0.109 cached, the 20-step comparison, all of it.
I did find one thing worth correcting while I was in there, and it cuts against my own numbers. Anthropic run two tokenizers. Claude 4.7 and later, which covers Sonnet 5, produce roughly 30% more tokens for the same text than Haiku 4.5 does. The table in this post compares them at a single token count, which quietly assumes the same text costs the same number of tokens on both. It does not. Switching to Haiku saves somewhat more than the 50% shown, because you are also billed for fewer tokens to say the same thing.
The calculator's limitations section says this now. I have not tried to model it, because the size of the gap depends on your actual text and I would rather show you a number I can source than one I estimated.
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Following up on my own caveat above, on the day it was meant to bite: the increase did not happen.
Anthropic cancelled it. Their pricing page now carries a note saying the $2/$10 announced at launch as introductory through 31 August is the standard price, and that the scheduled move to $3/$15 "will not occur". So every dollar figure in this post stands unchanged. $0.351 per run, $10,534 a month, $0.109 cached, the 20-step comparison, all of it.
Source, checked today: platform.claude.com/docs/en/about-claude/pricing
I did find one thing worth correcting while I was in there, and it cuts against my own numbers. Anthropic run two tokenizers. Claude 4.7 and later, which covers Sonnet 5, produce roughly 30% more tokens for the same text than Haiku 4.5 does. The table in this post compares them at a single token count, which quietly assumes the same text costs the same number of tokens on both. It does not. Switching to Haiku saves somewhat more than the 50% shown, because you are also billed for fewer tokens to say the same thing.
The calculator's limitations section says this now. I have not tried to model it, because the size of the gap depends on your actual text and I would rather show you a number I can source than one I estimated.