Does Gemini Flash 1.5 has Extra Token for Function Calling?

I’m comparing prices between Claude Haiku and Flash 1.5, which have different price rates and tokenizers for the Thai language.

Clearly, Flash 1.5 has a better tokenizer, converting 512 characters to 199 tokens, while Haiku converts 512 characters to 414 tokens.

Therefore, I’ve concluded that Flash 1.5 is more cost-effective for common chat,

but I would like to know about the extra token cost for function calling.