Significant enhancements in Python 3.14 encompass support for free-threaded Python, deferred evaluation of type annotations, template string literals, multiple interpreters in the standard library, and the introduction of a new module for compression. The significant enhancements in Python 3.14 include Zstandard compression, syntax highlighting in the Python REPL, a zero-overhead external debugger interface for CPython, support for UUID versions 6 to 8, restrictions on return/break/continue statements that exit a finally block, enhancements to the C API for Python configuration, the introduction of a new interpreter type, improved error messaging, a built-in implementation of HMAC with formally verified code from the HACL* project, a new command-line interface for inspecting running Python processes using asynchronous tasks, and support from the pdb module for remote attachment to a running Python process.
Python 3.14.0 beta 4 is here!
This is a beta preview of Python 3.14
Python 3.14 is still in development. This release, 3.14.0b4, is the last of four planned beta releases.
Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support the new feature release.
We strongly encourage maintainers of third-party Python projects to test with 3.14 during the beta phase and report issues found to the Python bug tracker as soon as possible. While the release is planned to be feature-complete entering the beta phase, it is possible that features may be modified or, in rare cases, deleted up until the start of the release candidate phase (Tuesday 2025-07-22). Our goal is to have no ABI changes after beta 4 and as few code changes as possible after the first release candidate. To achieve that, it will be extremely important to get as much exposure for 3.14 as possible during the beta phase.
This includes creating pre-release wheels for 3.14, as it helps other projects to do their own testing. However, we recommend that your regular production releases wait until 3.14.0rc1, to avoid the risk of ABI breaks.
