There are seven levels of (authentic) ḥadīth, and they are:
فمراتب الأحاديث سبعة وهي:
1. A ḥadīth that was collected by both al-Bukhārī and Muslim.
1 – ما اتفق عليه البخاري ومسلم.
2. A ḥadīth that was collected by al-Bukhārī (but not by Muslim).
2 – ما انفرد به البخاري.
3. A ḥadīth that was collected by Muslim (but not by al-Bukhārī).
3 – ما انفرد به مسلم.
4. A ḥadīth that is authentic according to the conditions of both al-Bukhārī and Muslim but was not collected by either of them. It is sometimes described as “Upon the conditions of the Ṣaḥīḥayn.”
4 – ما كان على شرطهما. وأحياناً يعبرون بقولهم: على شرط الصحيحين، أو على شرط البخاري ومسلم.
5. A ḥadīth that is authentic according to the conditions of al-Bukhārī (but was not collected by him).
5 – ما كان على شرط البخاري.
6. A ḥadīth that is authentic according to the conditions of Muslim (but was not collected by him).
6 – ما كان على شرط مسلم.
7. A ḥadīth that is authentic according to the conditions of other scholars of ḥadīth (who collected only authentic aḥadīth such as Ibn Khuzaymah and Ibn Ḥibbān in their Ṣaḥīḥs).
7 – ما كان على شرط غيرهما.
Muḥammad b. Ṣāliḥ al-ʿUthaymīn, Sharḥ al-Mandhūmah al-Bayqūniyah fī Muṣṭalaḥ al-Ḥadīth 1/42
“`ابن عثيمين، شرح المنظومة البيقونية في مصطلح الحديث ١/٤٢”`