Basically nothing especially if you use cheaper models and set the max token limit in `settings.json`. GPT-4 is $30.00 / 1M tokens for input and $60.00 / 1M tokens for output. For English text, 1 token is approximately 4 characters or 0.75 words. As a point of reference, the collected works of Shakespeare are about 900,000 words or 1.2M tokens. See https://openai.com/api/pricing and https://platform.openai.com/settings/organization/limits for limits.