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TEACHING WITH AI Slides with Citations

ASSIGNMENTS and PROMPTS

PRIVACY

Last verified: July 27, 2026. Everything below describes consumer and free accounts. If your campus has an institutional agreement (like Copilot) the terms are usually much better: training is normally off by default and retention is contractual. The single most common privacy mistake on campus is assuming the enterprise terms apply when faculty and students are actually signed in to the free consumer version.

WHAT THE PLATFORMS SAY THEY DO (consumer and free accounts, checked July 2026)

ToolChats used to train by default?Can you turn it off?RetentionWorth knowing
ChatGPT (OpenAI)YesYes. Settings > Data Controls > “Improve the model for everyone”Deleted chats and Temporary Chats are removed within 30 daysOpenAI began testing ads in ChatGPT in the US on February 9, 2026, on the Free and Go plans. Personalized ads can draw on past chats and memory. Plus, Pro, Business, Enterprise and Edu accounts are ad-free. Advertisers do not receive your chats. This matters for students, who are mostly on the free tier.
Claude (Anthropic)Yes, since August 2025Yes. Privacy Settings > Model Improvement. Incognito chats are always excluded.5 years if training is on, 30 days if offConversations flagged for safety review can be used regardless of your setting, and Anthropic does not say what triggers a flag. Flagged inputs are kept up to 2 years and safety scores up to 7.
Gemini (Google)YesYes. Turn off “Keep Activity” or use Temporary Chats.72 hours when Keep Activity is off, otherwise saved to your Google accountWhen Keep Activity is on, a sample of conversations may be read by human reviewers. This is a change from 2025, when Gemini offered no training opt-out.
Copilot (Microsoft)YesYes. Privacy > Training on conversation activityConversation history kept 18 months. You can delete individual items or the whole history.Opting out of model training does not exclude your conversations from other product improvement, advertising, safety, security or compliance uses. Microsoft serves personalized ads in Copilot, and your conversation history can feed them unless you turn personalization off. All of this applies to personal accounts. A work or school login falls under Enterprise Data Protection instead.
Meta AIYesNo opt-out in most regionsNot clearly specifiedSince December 16, 2025, Meta uses AI chat content to target ads across Facebook, Instagram, WhatsApp and Messenger, with no way to opt out. Religion, health, politics and sexual orientation are excluded from targeting but may still be stored. The EU, UK and South Korea are carved out.
Le Chat (Mistral)Yes on the Free, Pro and Education plansYes. “Allow your interactions to be used to train our models” in the Admin Console, or Settings > Data & Account Controls on mobile. Teams and Enterprise plans are opted out by default.See Mistral’s privacy documentation. Zero Data Retention is available on some plans.Uploaded documents count as input data, so an instructor on the Education plan who uploads student work is sharing it unless they opt out. Mistral collects less data than the US platforms and is covered by GDPR, which is much of why it topped the 2025 ranking below.
Grok (xAI)YesYes, in account settings (not independently verified in July 2026)See xAI’s privacy policyIn August 2025 roughly 370,000 shared Grok conversations were indexed by Google, including medical questions, uploaded files and at least one password, because the share links carried no “noindex” instruction. xAI fixed it after reporters found it. A strong privacy policy is not the same thing as a private product.
DeepSeekYesNo consumer opt-out documented!?!Not clearly specifiedData is stored on servers in China under its stated privacy policy, and the policy itself is unusually thin. Several governments have restricted it on official devices.

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