Sydney

Yes, besides requiring a ChatGPT Plus membership, if you use the GPT-4 model (with DALL·E, browsing, and data analysis), the limit is 25 'GPTs' messages / 3 hours, More limited than normal 40 GPT4 responses per 3 hours, 

The enterprise version of ChatGPT is,  100 GPT-4 messages per 3 hours.

Sydney is publicly available in the upcoming OpenAI's GPT Store, making it widely accessible to anyone interested in using this advanced ChatGPT.

 sorry, we are not sure, maybe the author hide the development information

no, we found no file uploaded. You can check the function section to see if there are other unique features. If not, this GPTs is just a simple prompt engineering, and its knowledge base is synchronized with the general ChatGPT, latest training up to April 2023.

No, only author can edit this GPTs. They can configure and update GPTs through GPT Builder at https://chat.openai.com/gpts/editor/g-DJGKIn5JK. The last modification date of Sydney was 2024-06-01 21:41:19 UTC.

Yes, conversations with Sydney will be recorded. OpenAI keeps these records, and you can share your conversations via a link. Refer to OpenAI's user privacy and data security policies for more information.

Yes, if author selected "Use conversation data in your GPT to improve our models" (in the GPTs Configure pages of Additional Settings), it means your conversations will be used for training and will influence this GPT AI agent.