# PEP 803: Stable ABI for Free-Threaded Builds

**URL:** <https://discuss.python.org/t/pep-803-stable-abi-for-free-threaded-builds/103628>\
**Category:** PEPs\
**Created:** [September 8, 2025, 1:32pm UTC](https://discuss.python.org/t/pep-803-stable-abi-for-free-threaded-builds/103628 "2025-09-08T13:32:22Z")\
**Posts on this page:** 1\
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**Author:** ![jamestwebber](https://sea2.discourse-cdn.com/flex002/user_avatar/discuss.python.org/jamestwebber/32/12799_2.png) [@jamestwebber](https://discuss.python.org/u/jamestwebber)\
**Post date:** [September 8, 2025, 7:34pm UTC](https://discuss.python.org/t/pep-803-stable-abi-for-free-threaded-builds/103628/10 "2025-09-08T19:34:59Z")

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I think he’s referring to this: [PEP 703 (Making the Global Interpreter Lock Optional in CPython) acceptance](https://discuss.python.org/t/pep-703-making-the-global-interpreter-lock-optional-in-cpython-acceptance/37075)

In particular, the end of Phase III mentions the possibility of maybe phasing out the GIL eventually, but there’s no timeline.

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