That is not true; GPT is the most reasoning efficient model family on the market.
Yeah, even without the resets, chatgpt subscription currently goes quite a bit further than an equivalent anthropic plan. The main reason to have an anthropic plan is to get access to Fable 5 if you feel the quality of output makes it worth it.
The benchmark article we're replying to shows that Grok token usage is at least on par with the latest OpenAI models [1], and significantly cheaper per token:
https://artificialanalysis.ai/models/grok-4-6#token-use
So depending on how you want to define "token efficiency", Grok is either tied with OpenAI, or in the lead.
[1] Though I grant that 4.6 appears to be wordier, on the order of Terra max.