Anthropic has announced plans to utilize user data, including chat transcripts and coding sessions, to train its AI models, unless users opt out. Starting September 28, 2025, data retention will extend to five years for accepting users. This applies to all Claude subscription tiers, but not to commercial usage. Anthropic assures users that it will not sell data to third parties and employs measures to protect privacy. Users are urged to read terms carefully before accepting changes.