ChatGPT will take your personalized instructions into account for each future conversation. The model will heed the instructions every time it responds, so you won't have to repeat your preferences or information in every conversation. For example, a teacher who is developing a lesson plan no longer needs to repeat that he or she is in third year science. For example, custom logistics software will have completely different functionality than a custom marketing analytics platform and will require different time and effort from the team. to complete the job. Requirements. Every requirement you have in mind can impact the cost of developing your custom software.