ChatGPT offers significant multimedia features that neither CotranslatorAI nor the OpenAI API platform supports. For example, you can paste in a screenshot and ask ChatGPT to convert it to text, often with better results than standard OCR tools. You can also generate images and browse the internet with ChatGPT. Therefore, CotranslatorAI cannot completely replace it.
DeepL is a different matter. Once you get the hang of the workflows in CotranslatorAI, you’ll never need to go back to DeepL. With the anchor prompting concept, you will get more consistency, more trainability, and more fluent translations. Some tests I’ve run have indicated that the stronger context also gets more accurate terminology on technical content.