If you built a custom assistant in Gemini — a Gem that writes in your tone, follows your rules or handles a recurring task — Google is about to change how it works. Gems are being retired and replaced by Skills, and the clock is already running: for personal Google accounts, Gems go read-only on November 17, 2026, and disappear entirely on December 17, 2026.
Google announced the change on September 30, 2026, and Skills have been rolling out in the Gemini app since October 13. On November 10, Google confirmed Skills are also beginning to roll out across Workspace Studio and supported Workspace apps. The good news is that you do not have to rebuild anything by hand — Google says it will automatically recreate your Gems as skills when they go away. The catch is in the fine print: not every file survives the move.
Key Takeaways
- What is changing: Gems — Gemini’s custom assistants, launched in August 2024 — are being replaced by Skills, reusable custom instructions that work across Gemini tasks.
- The dates that matter: Personal accounts — Gems go read-only November 17, 2026, and are removed December 17, 2026. Workspace business, enterprise and non-profit accounts follow in March 2027; education accounts in June 2027.
- What carries over: Google will automatically recreate your Gems as skills, but files over the 100 MB total skill limit are dropped, largest first — and GitHub files, audio, video, .doc/.xls/.ppt and archives do not carry over at all.
- What else goes away: Opal, Google’s experiment for building mini apps, and Gems by Google Labs disappear at the same time in November.
- Cost: Skills work in regular Gemini chat without a paid subscription — the only gate is being 18 or over on a personal account.
What Skills Are — and How They Differ From Gems
A Skill is a saved set of instructions that tells Gemini how to handle a task: what tone to use, what format to follow, what rules matter. Instead of pasting the same long prompt every time, you save it once and call it up with a forward slash in a chat thread — type “/” and pick the skill you want.
Skills started inside Gemini Spark, Google’s agent for paying subscribers, but they now reach free-tier users too. According to 9to5Google, the only gate Google lists is the age requirement — 18 or over on a personal account — with no subscription tier mentioned. You can also import a skill from another platform by uploading a SKILL.md file, though that import works on Mac and web only for now.
There are limits to know about. Skills do not yet run Canvas, Deep Research, Create video, Create music or Guided Learning, though connected apps such as Workspace apps do work with them. Google says the missing pieces are due over the coming weeks.
The Timeline: What Happens and When
For personal Google accounts (18 and over), the schedule is short. On November 17, 2026, Gems become read-only: you can still open them, but you cannot use, edit or create them. On December 17, 2026, Gems are removed from Gemini Apps completely and you can no longer access them.
Work and school accounts get more time. Workspace business, enterprise and non-profit accounts transition in March 2027, and education accounts in June 2027. If you are under 18 on a personal account, your Gems transition at a later date Google has not yet announced.
Google is also retiring Opal, its experiment for building mini apps, and Gems by Google Labs at the same time in November.
What to Save Before December 17
Google will automatically recreate your Gems as skills with their supported files — but “supported” does a lot of work in that sentence. Skills have a 100 MB total size limit for files. If a Gem’s files go over that limit, Google drops the biggest files first.
Worse, some file types do not carry over at all: GitHub files, audio, video, .doc, .xls, .ppt and archives. If any of those are attached to a Gem you still need, download them from the Gem before December 17, 2026 — after that date you cannot access them.
The safest move if you rely on a Gem: copy it into a skill yourself before November 17, while you can still use and edit it, and check that everything you need made the trip.
The Bigger Picture
The Gems-to-Skills switch is part of a wider push to make Gemini behave less like a chatbot and more like a reusable assistant. Skills are built to be shared and reused across tasks — in the Gemini app, and now in Workspace, where they can be created, edited, tested and shared through Workspace Studio and Google Docs.
The same pattern is showing up across the AI industry: reusable instruction packs that follow you from task to task instead of custom assistants locked inside one chat. Google’s version just happens to come with a hard deadline. If your Gems matter to you, November 17 is the date to beat — not December 17, when they are already gone.
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Frequently Asked Questions
When do Gemini Gems go read-only?
For personal Google accounts (18 and over), Gems become read-only on November 17, 2026. You can still open them, but you cannot use, edit or create them. They are removed from Gemini Apps on December 17, 2026.
Do I have to rebuild my Gems as Skills myself?
No. Google says it will automatically recreate your Gems as skills when they go away. But it is worth checking the result — files over the 100 MB skill limit are dropped, largest first, and some file types do not carry over at all.
Which files do not carry over from Gems to Skills?
GitHub files, audio, video, .doc, .xls, .ppt and archive files do not carry over. Download any of those from your Gems before December 17, 2026, or you will lose access to them.
Are Gemini Skills free?
Yes. Skills work in regular Gemini chat without a Google AI subscription. The only gate for personal accounts is being 18 or over, and the rollout is gradual, so the controls may not appear for every account on the same day.
When do work and school accounts lose Gems?
Workspace business, enterprise and non-profit accounts transition in March 2027, and education accounts in June 2027. Personal accounts under 18 transition at a later date Google has not yet announced.
Sources: Google Support, About the transition from Gems to skills; XDA Developers; AndroidPure; TechCrunch via WinZheng; Google Workspace Updates blog.
