"User Content: You may provide personal information in prompts and other content you input, such as files, images, audio, voice, video, and other material ("Input"). How we may use it: To provide, analyze, and maintain our Service; to develop and improve our Service and to conduct research; to ensure the security and integrity of our Service; for legal purposes."
xAI claims broad rights to use all user-submitted content — including files, images, audio, voice, and video — for research, service development, and model training, with no apparent opt-out mechanism described in the policy.