Anthropic Claude Opus 4.7 uses 33% more tokens than Opus 4.6
Even though the cost of Claude Opus 4.6 & Claude Opus 4.7 is same ($5/M input tokens and $25/M output tokens).
However, Claude Opus 4.7 uses different tokenizer which might use up to 33% more token usage for the same input if you compare it with Opus 4.6 or other models.
They’ve explictly called that out in their website.
Opus 4.7 uses a new tokenizer compared to previous models, contributing to its improved performance on a wide range of tasks. This new tokenizer may use up to 35% more tokens for the same fixed text.
And also it thinks more at higher effort levels (including xhigh), so effectively increases it even further.