Lithium

⭐ ⭐⭐⭐ (23,251 endorsements) 📥 122.3M downloads 📌 vmc26.2-0.25.3-fabric 📅 1/3/2021
🟡 Updated this year

By jellysquid3 · fabric

⬇ Download Mod Source: Modrinth ↗ 📅 Updated: 7/29/2026 📅 Created: 1/3/2021
⚠️ Install Order · 2 steps
1🛠️ Forge — Minecraft Forge (mod loader) Download ↗
2🛠️ Fabric — Fabric Loader Download ↗

Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.

🔍 Analysis

  • 👍 0.0% endorsement rate
  • 🏆 #6 of 1284 fabric mods in this game by downloads

📋 About This Mod

Lithium is a modern, general-purpose optimization mod for Minecraft which works to improve a number of systems (game physics, mob AI, block ticking, etc) with the goal of not changing any vanilla mechanics.

The mod works on both the client and server, and can be installed on servers without requiring clients to also have the mod (and vice versa.)

For multiplayer servers, administrators can expect a sizeable improvement to tick times, allowing their hardware to support more loaded entities, chunks, and players. Even in single-player, Lithium helps to improve performance by optimizing the internal game server, which is used for "ticking" the world. This can free up your computer's processor to focus on other tasks, resulting in improved frame rates and increased responsiveness.

The strict goal of maintaining exact behavior with vanilla makes Lithium suitable for almost any Minecraft server running Fabric, even for highly complex gameplay scenarios and creations. In fact, our continued insistence towards not changing vanilla gameplay has even led to the mod being officially allowed in (https://www.speedrun.com/mc).

## Installation

Make sure you have the latest version of Fabric Loader present and then simply drop the mod into your mods folder. No other mods or additional setup (not even Fabric API!) is required. You do not need to create new worlds in order to take advantage of the mod.

While you're at it, you may want to check out (https://modrinth.com/mod/sodium), which improves rendering performance.

## Configuration

Lithium makes use of an semi-unusual configuration system which allows you to enable or completely disable patches the mod applies. This system allows fine-grained control over what code in Minecraft is modified by Lithium, and as such, can be used to completely eliminate bugs or mod incompatibilities introduced by the mod.

For more information, please read (https://github.com/CaffeineMC/lithium-fabric/wiki/Configuration-File) on modifying your configuration file.

Please note: An empty configuration file is perfectly normal and just means you want to use the default options, which are already set up out of the box for the best performance the mod can offer.

## Reporting Issues

Please use the issue tracker linked at the top of the page to report bugs, crashes, and other issues.

🤖 AI-enhanced — based on mod data

Lithium is a general-purpose optimization mod for Fabric that improves game physics, mob AI, and block ticking without changing vanilla mechanics. It works on both client and server, and can be installed on servers without clients needing it. With over 23k endorsements and 122M downloads, it's a trusted performance boost for any Fabric server or single-player world.

✨ Key Features

Optimizes game physics, mob AI, and block ticking without altering vanilla mechanics.
Works on both client and server, and can be installed on servers without clients needing the mod.
Improves tick times on multiplayer servers, supporting more entities, chunks, and players.
Enhances single-player performance by optimizing the internal game server, leading to improved frame rates.
Officially allowed in Minecraft speedrunning due to its strict vanilla behavior.
Requires only Fabric Loader; no Fabric API or additional setup needed.

📊 Pros & Cons

✅ Pros

  • Massive community trust: 23,251 endorsements and 122.3M downloads prove it's a go-to performance mod.
  • Vanilla-friendly design means it's safe for speedrunning and complex gameplay scenarios.
  • Server-side install works without clients, making it a no-brainer for server admins.

⚠️ Cons

  • Fabric-only, so Forge or NeoForge users are out of luck.
  • Configuration system is semi-unusual, so tweaking patches may require reading docs.
  • Last updated in 2026, but if you're on an older MC version, you'll need to check for matching builds.
🎯 Is This For You?
This is for server admins who want to squeeze more performance out of their hardware without changing gameplay, and for single-player folks who want smoother FPS without sacrificing vanilla behavior. It's also a must-have for speedrunners who need a legal performance boost.
📦 Install:Easy· Under 1 minute

💡 Beginner Tips

  • Just drop the jar into your mods folder after installing Fabric Loader—no Fabric API needed.
  • If you run into mod conflicts, use Lithium's config to disable specific patches instead of removing the whole mod.
  • Pair it with Sodium for even better rendering performance, as the author suggests.

📊 Mod Details

Game
Minecraft Mods
Author
jellysquid3
Version
mc26.2-0.25.3-fabric
Downloads
122,293,884
Endorsements
23,251
Category
fabric
Created
1/3/2021
Updated
7/29/2026
Game Versions
26.2
Tags
optimization

🔗 Required By 1 Mod

These mods list this mod as a dependency.

🔧 How to Install Minecraft Mods Mods

Download from Modrinth. Use Prism Launcher or drop into your mods folder.

📖 Full step-by-step install guide for Minecraft Mods →

Visit the official mod page for specific installation instructions for this mod.

🎮 Need cheat codes or console commands? Check ur gaming wiki for Minecraft Mods commands, item IDs, and more.

❓ Frequently Asked Questions

Which Minecraft Mods versions does Lithium support?

The author lists 26.2. Other versions may work but are untested by the author.

What is the latest version of Lithium?

Version mc26.2-0.25.3-fabric, published 2026-07-29 with 122.3M downloads recorded at the source.

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