Table 4. Phase 2 generative artificial intelligence access.

Characteristics	ChatGPT 3.5	Microsoft CoPilot	Google Gemini	Claude
Date accessed	8/16/24	8/16/24	8/16/24	8/22/24
Barriers to access	Must have an account (free)—data limited for free account.	Available through Microsoft Edge.	Personal Google account (free).	Must have an account (free).
Required login?	Yes	No, but limited access without log-in.	Yes	Yes
Saves chat record?	Yes, but it can be disabled. However, all chats are saved for at least 30 days.	Yes, if enabled.	Can be disabled but is available even if disabled up to 72 hours.	Yes, they are saved until deleted by the user or ending the account.
Age limit for an account	Personal account for ages 13‐18 with parental permission.	Personal account for ages 13 years and older. Education access for 18 years and older.	Ages 13 years and older with a personal account; 18 years and older with a work school account.	Ages 18 years and older. Confirmation for age is a checkbox.