Meta AI (FAIR) — User Count: 1 billion

Note: The source URL returns only a CAPTCHA verification page ('Verifying that you are not a robot...') with no actual data about Meta AI user counts. The provided excerpt contains no factual information about Meta AI's user count, making it impossible to verify or contradict the claim of 1 billion users as of 2025-03. While the additional context mentions 'over 1 billion monthly active users across Meta platforms,' this refers to Meta's overall platform users, not specifically Meta AI (FAIR)'s user count, and does not constitute verification of the specific claim.