Steering Council accented the proposal to make the GIL (Global Interpreter Lock) optional.

CPython’s global interpreter lock (“GIL”) prevents multiple threads from executing Python code at the same time. The GIL is an obstacle to using multi-core CPUs from Python efficiently.

The proposal will be implemented gradually:

Short term, we add the no-GIL build as an experimental build mode, presumably in 3.13 (if it slips to 3.14, that is not a problem)

Long-term (probably 5+ years), the no-GIL build should be the only build.