Python 3.15.0 added to actions/python-versions. Bit of a niche link, but I've been waiting for this for a couple of days - I even told ChatGPT to check for it:
\n\n\n\n
Clone https://github.com/actions/python-versions and git pull once an hour until they add the stable 3.15 - then tell me about it
Now that this has landed, you can add "3.15" to a GitHub Actions testing matrix to run tests against the new Python 3.15.0 release.
Posted 10th October 2026 at 11:58 pm
\nThis is a link post by Simon Willison, posted on 10th October 2026.
\ngithub 196 python 1,291 github-actions 73 chatgpt 205
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\n\n", "content_markdown": "**[Python 3.15.0 added to actions/python-versions](https://github.com/actions/python-versions/commit/49858b91c92d27403416ee43117032e91d00ce24)**. Bit of a niche link, but I've been waiting for this for a couple of days - I even [told ChatGPT](https://chatgpt.com/share/6acad42a-2868-83e8-9a16-736f9def2b45) to check for it:\n\n> `Clone https://github.com/actions/python-versions and git pull once an hour until they add the stable 3.15 - then tell me about it`\n\nNow that this has landed, you can add `\"3.15\"` to a GitHub Actions testing matrix to run tests against the [new Python 3.15.0 release](https://www.python.org/downloads/release/python-3150/).\n\nPosted [10th October 2026](https://simonwillison.net/2026/Oct/10/) at 11:58 pm\n\n## Recent articles\n\n- [Hello Python 3.15, goodbye 3.10, and now I can use 3.11](https://simonwillison.net/2026/Oct/12/python-3-15/) - 12th October 2026\n- [A new feature for my blog, built using my voice](https://simonwillison.net/2026/Oct/9/built-using-my-voice/) - 9th October 2026\n- [Claude Haiku 5.5](https://simonwillison.net/2026/Oct/7/claude-haiku-5-5/) - 7th October 2026\n- [We're going to need default hard budget caps on pretty much everything](https://simonwillison.net/2026/Oct/3/default-hard-budget-caps/) - 3rd October 2026\n\nThis is a **link post** by Simon Willison, posted on [10th October 2026](https://simonwillison.net/2026/Oct/10/).\n\n[github 196](https://simonwillison.net/tags/github/) [python 1,291](https://simonwillison.net/tags/python/) [github-actions 73](https://simonwillison.net/tags/github-actions/) [chatgpt 205](https://simonwillison.net/tags/chatgpt/)\n\n### Monthly briefing\n\nSponsor me for **$10/month** and get a curated email digest of the month's most important LLM developments.\n\nPay me to send you less!\n\n[Sponsor & subscribe](https://github.com/sponsors/simonw/)\n", "dateCreated": "2026-10-11T02:08:53.023536769+00:00", "date_created": "2026-10-10T23:58:04+00:00", "date_modified": "2026-10-10T23:58:04+00:00", "date_published": "2026-10-10T23:58:04+00:00", "description": "Python 3.15.0 added to actions/python-versions Bit of a niche link, but I've been waiting for this for a couple of days - I even told ChatGPT to check for it: Clone https://github.com/actions/python-versions and git pull once an hour until…", "external_url": "https://simonwillison.net/2026/Oct/10/python-actions/", "git": { "commit": "ebb0941c5c06a2ab2377342d607535262a3e969e", "path": "items/simonwillison-net/2026/10/2026-10-10-python-3-15-0-added-to-actions-python-versions.md", "permalink": "https://github.com/aymericbeaumet/aggr-instance/blob/ebb0941c5c06a2ab2377342d607535262a3e969e/items/simonwillison-net/2026/10/2026-10-10-python-3-15-0-added-to-actions-python-versions.md" }, "id": "urn:aggr:item:b87bc73c23a36fd24652f61c03a1cc3158359be6", "isBasedOn": { "@id": "https://simonwillison.net/2026/Oct/10/python-actions/" }, "mainEntity": { "@id": "https://simonwillison.net/2026/Oct/10/python-actions/", "@type": "CreativeWork", "archivedAt": { "@id": "https://aggr.aymericbeaumet.com/items/simonwillison-net/2026-10-10-python-3-15-0-added-to-actions-python-versions/#webpage" }, "dateModified": "2026-10-10T23:58:04+00:00", "datePublished": "2026-10-10T23:58:04+00:00", "headline": "Python 3.15.0 added to actions/python-versions", "timeRequired": "PT1M", "url": "https://simonwillison.net/2026/Oct/10/python-actions/", "wordCount": 186 }, "name": "Archived snapshot: Python 3.15.0 added to actions/python-versions", "preview": null, "reading_minutes": 1, "replicated_at": null, "source": "simonwillison-net", "source_name": "Simon Willison's Weblog", "summary": "Python 3.15.0 added to actions/python-versions Bit of a niche link, but I've been waiting for this for a couple of days - I even told ChatGPT to check for it: Clone https://github.com/actions/python-versions and git pull once an hour until they add the stable 3.15 - then tell me about it Now that this has landed, you can add \"3.15\" to a GitHub Actions testing matrix to run tests against the new Python 3.15.0 release. Tags: github, python, github-actions, chatgpt", "tags": [ "chatgpt", "github", "github-actions", "python" ], "temporalCoverage": "2026-10-11T02:08:53.023536769+00:00", "title": "Python 3.15.0 added to actions/python-versions", "url": "https://aggr.aymericbeaumet.com/items/simonwillison-net/2026-10-10-python-3-15-0-added-to-actions-python-versions/", "word_count": 186 }