OpenAI
here is a Prompt Engineering guide from OpenAI
https://platform.openai.com/docs/guides/prompt-engineering
using this guide I was able to create more specific and great responses from the model gpt-4-turbo-1106 using the tactics and strategies for SAiC (Smart AI Chat Bot)
a good pricing calculator at https://docsbot.ai/tools/gpt-openai-api-pricing-calculator