it cost $47 because of ~2k initial prompt and not-optimized context history (it was a lot of characters after 10 minutes), but it was worth it. GPT-4 is really accurate with the System prompt, so it asks for difficulty checks, kills you without a doubt, saves your loot and XP. If you want to play such DND-like TTRPG with GPT-4 — please upvote <3