QGIS 4 AI Plugins: 18 of 28 Listed as Compatible

On 11 November 2026, 18 of the 28 AI plugins I checked in the official QGIS plugin repository have a stable version listed as compatible with QGIS 4. Nine are still declared for QGIS 3 only, Mapflow and Deepness among them, and one, SamGeo, is listed only through an experimental version.

One limit before the table. I read every line from the repository's metadata, and only QGIS 3.44 is installed on my Mac, so I ran none of these plugins on QGIS 4. "Listed" means the author declared a version range that covers QGIS 4. It tells you what QGIS 4 will offer to install, and it is not a test result.

Three of the rows are ours and are marked. I work on one of them, AI Agent, which is why I keep an eye on this list.

What "listed for QGIS 4" means

Every QGIS plugin ships a small file, metadata.txt, where its author writes the oldest and the newest QGIS version it supports: qgisMinimumVersion and qgisMaximumVersion. The repository shows a plugin version on its QGIS 4 Ready page when one of those two numbers is 4.0 or higher. That is the whole rule, and it is written in the repository's migration guide.

So the list is a declaration by each author. The repository does run an automated Qt6 check on every upload, but the same guide says the check is "informational only" and does not block a plugin.

The 19 AI plugins with a version listed for QGIS 4

Each row gives the newest version the repository offers to a QGIS 4.0 install, its upload date and the range its author declared. The list for QGIS 4.2 gave the same answer for all 28 plugins.

Two rows need a second look. SCP serves two different versions: QGIS 4 is offered 9.0.5, while QGIS 3 is offered 8.5.0 from 16 November 2024, so the same project can meet a different SCP on each side. SamGeo's stable version, 1.2.0, is declared for 3.28 to 3.99, and only its experimental 1.4.0 covers QGIS 4. That is the 19th row, and the reason the count of stable listings stops at 18.

The 9 AI plugins not listed for QGIS 4

These nine have no version, stable or experimental, in the list for QGIS 4.0. The row shows the version a QGIS 3.44 install is offered.

Not listed doesn't always mean abandoned. Mapflow, AutonomousGIS Spatial Analysis Agent and AtQuery all uploaded a version after QGIS 4.0 came out, and each still declares 3.99 as its ceiling. For the other six, the latest version predates the release. I can't tell from metadata whether any of the nine would load in QGIS 4, only that QGIS 4 is not offered them.

How I built the table. On 11 November 2026 I downloaded the repository's plugin lists for QGIS 4.0, 4.2 and 3.44 and kept one row per plugin. The 28 are the 19 AI plugins named in our comparison of AI plugins for QGIS, plus every other plugin above 10,000 downloads whose name, description or tags mention AI, GPT, Claude, LLM, Segment Anything, deep learning or MCP, read one by one to drop the false matches. Smaller plugins are not in it. Dates are upload dates in UTC, and downloads are the repository's total for each plugin.

How to check any plugin yourself

The table will age, and your plugin may not be in it. The check takes a minute.

To see the full list a QGIS 4 install receives, open https://plugins.qgis.org/plugins/plugins.xml?qgis=4.0 in a browser and search the page for the plugin's name.

What to do when a plugin you need is not listed

Keep QGIS 3.44 next to QGIS 4. On 11 November 2026 the download page offers 4.2.3 as the current version and 3.44.15 as the long-term release, and it describes the Windows network installer as the way to run several versions on one system. Do the work that depends on the missing plugin in 3.44, and the rest in 4.

Then look for an experimental version, as with SamGeo. In QGIS, open Plugins > Manage and Install Plugins, go to Settings and tick Show also Experimental Plugins. An experimental version is one its author doesn't call stable yet, so try it on a copy of your project first.

If there is nothing, the plugin's page links to its bug tracker, and a short, polite request there is the most useful thing you can do. I would not edit qgisMaximumVersion by hand to force an install. The number is only a declaration, and changing it changes nothing in the code behind it.

What changed for plugins in QGIS 4

QGIS 4.0 was released on 6 March 2026. Its changelog describes the release as the move of the QGIS core onto the Qt6 framework, the toolkit that draws the interface. What is QGIS covers the user side of that change.

For a plugin, three things follow, all from the changelog and the repository's migration guide:

• Code. QGIS 4 uses Qt 6, "which requires code changes in plugins". The guide tells authors to replace PyQt5 imports, or to import through qgis.PyQt, a layer QGIS provides so that one plugin can serve both versions.
• Old APIs. The project kept deprecated APIs "where possible" to limit the work, but says some legacy ones, such as the Processing API from QGIS 2.x, are not guaranteed for the life of the 4.x series.
• The flag. During the pre-release period, authors marked a plugin with supportsQt6=True. That flag was removed from QGIS and "has no effect" now. Only the version range counts.

Across the whole repository, the QGIS 4 Ready page showed 1,661 records on 11 November 2026, against 4,518 on the page that lists all plugins. That is about 37%. AI plugins are ahead of it in this sample, at 18 of 28, which fits their age: 15 of the 18 listed plugins first appeared in the repository in 2025 or 2026, and 8 of the 9 that are not listed appeared before 2025.

Questions people ask

Do QGIS 3 plugins work in QGIS 4?

Not automatically. QGIS 4 is built on Qt6, and the repository's migration guide says this requires code changes in plugins. A QGIS 4 install is only offered the plugin versions whose declared range reaches 4.0. On 11 November 2026 the repository's QGIS 4 Ready page showed 1,661 records, out of 4,518 plugins in total.

Are Mapflow and Deepness available for QGIS 4?

Neither was listed for QGIS 4 on 11 November 2026. Mapflow 3.6.3, uploaded on 14 September 2026, declares QGIS 3.20 to 3.99. Deepness 0.6.5, uploaded on 10 December 2024, declares 3.22 to 3.99. Both are offered to QGIS 3.44.

Which Segment Anything plugins are listed for QGIS 4?

GeoAI 1.8.1, GeoOSAM 1.4.4 and Geo SAM 2.0 each have a stable version listed for QGIS 4 on 11 November 2026. SamGeo is listed only through its experimental version 1.4.0. This is read from the repository metadata and I did not run them on QGIS 4.

Should I move to QGIS 4 now?

It depends on your plugins more than on QGIS. Check each plugin you rely on with the three steps above. If one is missing, keep QGIS 3.44, the long-term release, installed next to QGIS 4 and move the work over when that plugin's range reaches 4.0.