15-30x more expensive doesn't necessarily mean it actually requires 15-30x more computation. I'm certain GPT-4 is extremely profitable; they can charge whatever

15-30x more expensive doesn't necessarily mean it actually requires 15-30x more computation. I'm certain GPT-4 is extremely profitable; they can charge whatever they want because nothing else like it exists. 3.5 turbo also isn't GPT-3/Davinci, which is still more expensive and often better for non chatbot functions. Additionally, 4 definitely provides at least 15x more value for me than 3.5. Turbo is a toy by comparison. The differences on complex tasks are subtle but profound. OpenAI just received $10B and had to pause new paid subscriptions because more people were signing up than their hardware could handle. Even if they think it is diminishing returns they can afford to try.