Every plan has limits that reset on a rolling 5-hour session window; paid plans add weekly limits. No fixed message count. Pro gives at least 5x more usage per 5-hour session than Free; Max gives 5x or 20x Pro. Chats and Claude Code draw from the same pool; paid plans can turn on usage credits at API rates. (source: claude.com, checked 2026-10-17. Caps change often; check the official page.)