Grok 4.7 tokens cost 5x less for input and 8.33x less for output than GPT-6 Astra. Grok 4.7: $2 input / $6 output. GPT-6 Astra: $10 input / $50 output. Yet Astra still comes out cheaper per task on Artificial Analysis: Grok 4.7: $3.74 GPT-6 Astra: $3.26 That’s how much token efficiency matters.