Current development cycle (2022)
As of 9.6.beta4, sympy is still version 1.9 :
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.6.beta4, Release Date: 2022-03-08 │
│ Using Python 3.9.10. Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable. ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
sage: import sympy
sage: sympy.__version__
'1.9'
HTH,
I just checked that my (systemwide) sympy is 1.10, and that Sage’s sympy is still 1.9…