# Python 3.15.0 alpha 5 (yes, another alpha!)

DevFeed: [Python 3.15.0 alpha 5 (yes, another alpha!)](<https://devfeed.tech/articles/python-3-15-0-alpha-5-yes-another-alpha-2387.md>)

Original publisher: [Read original article](<https://blog.python.org/2026/01/python-3150-alpha-5-yes-another-alpha/>)

Author: Hugo van Kemenade

Published: 2026-01-14T00:00:00Z

Content type: release

Language: en

Sources: [Python Insider](<https://devfeed.tech/sources/python-insider.md>)

Topics: [Python](<https://devfeed.tech/topics/python.md>), [releases](<https://devfeed.tech/topics/releases.md>), [JIT](<https://devfeed.tech/topics/jit.md>), [Compiler](<https://devfeed.tech/topics/compiler.md>), [Linux](<https://devfeed.tech/topics/linux.md>), [macOS](<https://devfeed.tech/topics/macos.md>)

Tags: [community](<https://devfeed.tech/tags/community.md>), [documentation](<https://devfeed.tech/tags/documentation.md>), [feature](<https://devfeed.tech/tags/feature.md>), [jit](<https://devfeed.tech/tags/jit.md>), [linux](<https://devfeed.tech/tags/linux.md>), [macos](<https://devfeed.tech/tags/macos.md>), [performance](<https://devfeed.tech/tags/performance.md>), [python](<https://devfeed.tech/tags/python.md>), [release](<https://devfeed.tech/tags/release.md>), [releases](<https://devfeed.tech/tags/releases.md>)

## AI overview

Python 3.15.0 alpha 5 is an extra early developer preview release, issued after an earlier alpha was built against the wrong date. The article outlines planned and implemented changes, including a new statistical sampling profiler, UTF-8 as the default encoding, a new C API for creating Python bytes objects, JIT compiler upgrades, improved error messages, and the upcoming alpha release schedule.

## Source excerpt

Note: 3.15.0a4 was accidentally built against from 2025-12-23 instead of 2026-01-13, so this 3.15.0a5 is an extra release correctly built against 2026-01-14...