Gemini with 2 dollars signs cost more than claude with 3 dollars signs on same prompt

Claude sonnet 4.6 on default settings costs less than Gemini flash 3.5 on default settings, Even though Gemini flash 3.5 has 2 dollars signs.

Claude

https://t3.chat/share/hph04tw5r2

Gemini

https://t3.chat/share/lpy04ghauj