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JAOPCAGTMinecraft mod for 1.21.1

Just A Ore Processing Compatibility Attempt: GregTech

client and servernewest supported 1.21.1TechnologyUtilityCursed
Latest version
GTCEu-1.20.1-2.1.2.10
Minecraft
1.7.10 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
MIT
Downloads
7.6k
Updated
10 mo ago
Available on
Modrinth
Space NodeOur hosting

Host JAOPCAGT servers

One click and JAOPCAGT is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version JAOPCAGT declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.21Forge, NeoForge21+declared13 Jun 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.19.2Forge, NeoForge17+declared5 Aug 2022
1.12.2NeoForge, Forge8+declared18 Sept 2017
1.7.10Forge, NeoForge8+declared14 May 2014

Download

From JAOPCAGT’s own host. Nothing is re-hosted here.

All 28 releases
GTCEu-1.20.1-2.1.2.10alpha12 Dec 2025

JAOPCAGTCEu-1.20.1-2.1.2.10.jar · 86 KB · for 1.20.1

Download latest
3858c8049162…
Older versions24
  • GTCEu-1.21.1-3.0.1.331 Jul 20251.21.184 KB407 downloadsf69d56b1fae5…Get
  • GTCEu-1.20.1-2.1.2.931 Jul 20251.20.186 KB450 downloads48140b62200c…Get
  • GTCEu-1.21.1-3.0.0.210 Mar 20251.21.186 KB201 downloadsd184e69269fe…Get
  • GTCEu-1.20.1-2.1.1.810 Mar 20251.20.187 KB877 downloads86e7a0b9b5c2…Get
  • GTCEu-1.19.2-2.0.1.710 Mar 20251.19.288 KB102 downloads41f1af602bff…Get
  • GTCEu-1.12.2-1.0.1.810 Mar 20251.12.262 KB261 downloads01de7d5d2836…Get
  • GTCE-1.12.2-1.0.0.710 Mar 20251.12.259 KB66 downloads3babf482484e…Get
  • GT5-1.7.10-1.0.0.410 Mar 20251.7.1060 KB181 downloads63c34e03be97…Get
  • GT4-1.7.10-1.0.0.610 Mar 20251.7.1047 KB76 downloads71c2913a987b…Get
  • GTCEu-1.21.1-3.0.0.128 Sept 20241.21.193 KB269 downloads2b3ac94c39ea…Get
  • GTCEu-1.20.1-2.1.1.728 Sept 20241.20.194 KB913 downloads9ac5b3489ee2…Get
  • GTCEu-1.21-3.0.0.06 Aug 20241.2192 KB164 downloads2bf0f3532d26…Get
  • GTCEu-1.20.1-2.1.1.66 Aug 20241.20.194 KB228 downloads0ab444f31cac…Get
  • GTCEu-1.19.2-2.0.1.66 Aug 20241.19.294 KB172 downloads043243cce5ff…Get
  • GTCEu-1.12.2-1.0.1.76 Aug 20241.12.268 KB220 downloads2faac218b8af…Get
  • GTCE-1.12.2-1.0.0.66 Aug 20241.12.266 KB126 downloadsf0d101ca54b1…Get
  • GT5-1.7.10-1.0.0.36 Aug 20241.7.1066 KB166 downloads5a4d4493dcd9…Get
  • GT4-1.7.10-1.0.0.56 Aug 20241.7.1052 KB113 downloads036497934cac…Get
  • GTCEu-1.21-3.0.a.024 Jul 20241.2191 KB133 downloads3d37369e3cdb…Get
  • GTCEu-1.20.1-2.1.1.524 Jul 20241.20.193 KB154 downloadsb24e0dbc5332…Get
  • GTCEu-1.19.2-2.0.1.524 Jul 20241.19.293 KB102 downloads595f264ff229…Get
  • GT5-1.7.10-1.0.0.224 Feb 20241.7.1065 KB160 downloads4e5bd9e81c47…Get
  • GT4-1.7.10-1.0.0.424 Feb 20241.7.1051 KB134 downloads086fb508291a…Get
  • GTCEu-1.20.1-2.1.1.418 Feb 20241.20.193 KB921 downloadsff8c100b944b…Get

Frequently asked

Does JAOPCAGT work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version JAOPCAGT declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does JAOPCAGT support?

Everything the author has declared, from 1.7.10 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install JAOPCAGT on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does JAOPCAGT support?

NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for JAOPCAGT?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is JAOPCAGT under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install JAOPCAGT?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download JAOPCAGT safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from Modrinth, where the author last updated it on 12 Dec 2025. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .