How Grok, ChatGPT, Claude, Perplexity, and Gemini Use Your Data for AI Training

By -Ai Technology world

August 30, 2025

Grok may use your prompts, responses, and interactions to enhance its language understanding, accuracy, and safety. If you're using it via X, your platform interactions might also contribute to training unless you opt out.
You can disable data usage via Grok settings (mobile app or grok.com), or by contacting privacy@x.ai.
A Private Chat mode ensures your data isn’t used for training. Deleted chats are typically purged in 30 days unless retained for safety or legal reasons. Enterprise users may operate under separate data arrangements.

By default, OpenAI may use your prompts, files, images, audio, and conversational content to improve and train their models.
You can opt out of this via their privacy portal (“do not train on my content”), which stops future usage but doesn’t guarantee retroactive deletion.
Temporary Chat mode offers chat sessions that aren't used for training, don’t appear in history, and don’t create memories.
For business/enterprise users, data is not used for model training unless explicitly opted in.
OpenAIOpenAI Help CenterDigit

Historically, consumer inputs weren't used to train Claude unless users explicitly opted in.
A policy change starting September 2025 flips to opt-in by default, meaning user data may be stored up to five years and used for model improvement unless opted out by a set deadline.
Opt-out is possible via settings, but once data has been used for training, it cannot be withdrawn.
Enterprise, API, and government users remain exempt, protected under separate agreements.
Claude’s training leverages a unique “Constitutional AI” approach and includes strong privacy safeguards to avoid disclosing sensitive info.

Perplexity may use user queries, prompts, and outputs to train and improve its AI—unless you opt out.
You can disable AI data usage from your account settings, and request deletion of your content (e.g., by emailing support).
It claims no data selling, and only shares with trusted service providers.
Enterprise policies prohibit using customer data for training; additional sophisticated compliance (SOC 2, HIPAA, etc.) enhances security.
Note that there are broader controversies: media publishers are suing Perplexity for allegedly using content without authorization, and Cloudflare has accused their bots of scraping blocked content—issues that raise ethical and copyright concerns.
The Times of India+1New York PostTechRadarWindows Central

Gemini’s data usage reflects Google’s broader ecosystem: chats, files, images, audio, and feedback may be used to improve machine learning systems. Human reviewers might process the data.
You can disable activity tracking (e.g., Gemini Apps Activity) via myactivity.google.com and control data use with separate toggles for audio or Live sessions.
Temporary chats are generally not used unless feedback is submitted. App-linked data (like Google Docs) is protected.
Chats can be retained for only ~72 hours if activity tracking is disabled. Workspace (business/educational) accounts follow different privacy terms.

Platform	Data for Training	Privacy Control	Special Notes
Grok	Yes (with option to disable)	Via settings / Private Chat	30-day deletion default
ChatGPT	Yes (unless opted out)	Privacy portal, Temporary Chat	Enterprise plans are exempt unless opted in
Claude	Opt-in default starting Sept 2025	Toggle after prompt	Exempt for enterprise; uses Constitutional AI
Perplexity	Yes (unless opted out via settings)	Settings / deletion request	Enterprise data never used; legal issues
Gemini	Yes (activity may train models)	Google activity dashboard toggles	Workspace terms differ; retention control

Default behaviors matter. Claude’s shift to opt-in by default is a notable shift away from privacy-first concerns.
User action is key. Across all platforms, you must proactively opt out or tweak settings if you want to keep your data from being used in training.
If your data is sensitive, enterprise or local solutions often offer stronger protections and formal guarantees.