Earlier today, OnePlus confirmed its new update policy for its device portfolio. Flagship devices starting with the OnePlus 8 series will now get three major Android OS updates and four years of security updates. This includes T-series and R models too.

OnePlus extends software support for its smartphones
OnePlus Nord and Nord CE devices will get two major OS updates alongside three years of security patches. Nord N series devices are in for one Android OS update and three years of security updates. OnePlus flagships released prior to the OnePlus 8 series will follow the old update policy of two Android OS updates and three years of security updates.

• Three OS updates and 4 years of security updates:
• OnePlus 9 Pro
• OnePlus 9R
• OnePlus 9
• OnePlus 8T
• OnePlus 8 Pro
• OnePlus 8
  Two OS updates and 3 years of security updates:
• OnePlus 7 Pro
• OnePlus 7T Pro
• OnePlus 7T
• OnePlus 7
• OnePlus Nord CE
• OnePlus Nord
  One OS update and 3 years of security updates:
• OnePlus N200 5G
• OnePlus N100
• OnePlus N10 5G

The new post also confirms the unification of the OxygenOS and ColorOS codebase starting with Android 12.