LazyAI
LazyAI, a Fabric server mod, lowers how often distant mobs run their AI, so server tick load drops on busy worlds.
What it does
LazyAI scales mob AI updates by distance from players. Mobs far from every player run their goals and pathfinding less often, and the calculation is based on the simulation distance setting. The mod also simplifies path calculations over long distances and reduces how often the look, wander and tempt goals run for distant mobs. Tempting delay for animals can be adjusted separately.
Fabric API is required, and Mod Menu is optional for opening the settings screen. Only the server needs the mod, so players join without installing anything. The AI Optimization Type setting controls how aggressive the reductions are, and the Distance Scaling setting defines which range counts as close or far. The project is open source under the GNU General Public License v3.0 only, with a public source code repository and issue tracker. Files are published for Fabric across 29 release versions, 1.19 – 26.3.
Key features
Distance-based AI scaling
Mobs far from players receive fewer AI updates, which reduces work on the server.
Long-distance pathfinding
Path calculations over long distances are simplified to save processing time.
Adjustable aggressiveness
The AI Optimization Type setting sets how strong the reductions are, from mild to aggressive.
Configurable tempting delay
A separate setting controls how long animals take to react to a tempting item.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
Use cases
Busy multiplayer servers
Server owners with many mobs loaded can reduce the tick load caused by entities outside player range.
Mob farms
Farm operators can test the effect on output, since the reduction in throughput was measured on one iron golem farm.
Who it’s for: Server owners running Fabric who want lower tick load from mob AI, and players who want to keep farm output close to vanilla.
How it compares
Despawn Mobs Simulation Distance is server-side only, open source under the CC0 1.0 Universal license, and published for 1.21 – 1.21.11 on Fabric. Better Render Distance is client-side only, not open source, and covers 1.21 – 26.3 on Fabric. LazyAI sits on the server like Despawn Mobs Simulation Distance, but targets Fabric across the wider 1.19 – 26.3 range under GPL 3.0.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| LazyAI | Fabric | 1.19 – 26.3 | Server-side only | 2026-09-22 |
| Despawn Mobs Simulation Distance | Fabric | 1.21 – 1.21.11 | Server-side only | 2026-03-23 |
| Better Render Distance | Fabric | 1.21 – 26.3 | Client-side only | 2026-09-17 |
Questions
Does LazyAI need to be installed on clients?
Does LazyAI reduce mob farm output?
What does LazyAI require?
In the catalog
LazyAI is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.
More from PixelIndieDev
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What the author says
Lazy AI bases its distance calculations of the simulation distance * distance scaling of your game Long awnser: Yes, LazyAI does affect mob farm efficiency, but the throughput impact is minimal. In testing with my iron golem farm, vanilla Minecraft yielded 1023 iron ingots, while with the LazyAI on the aggressive…
Official listing
- Modrinth page
- modrinth.com/mod/lazyai
- Owner
- PixelIndieDev
- Published
- 2025-10-05
- Updated on Modrinth
- 2026-09-22
- Facts verified
- 2026-10-15