AI Builder - Minecraft AI Assistant
by liuzeen1234
AI Builder adds an in-game AI chat that can plan and place structures from natural language, blueprint files and a limited set of server commands.
What it does
Players open the chat with the K key and describe what to build. The assistant can place, fill and clear blocks, create or place blueprints from .nbt, .litematic and MCBLUEPRINT v2 text files stored under ai-helper/structures, and run a restricted set of commands such as giving items, summoning entities and setting the time or weather. Blueprint coordinates are relative, with X pointing east, Y up, Z south and the origin at the player's feet. Each fill or clear run touches at most 10,000 blocks, each item grant stops at 64 items, and spawns are capped at 20 entities.
The mod works with OpenAI-compatible APIs and Anthropic Messages APIs, and an api format setting of auto picks the endpoint type on its own. Keys and endpoints are edited in the config file, and aiconfig reload applies changes without a restart. Blocks and block-entity data are preserved on export, including container inventories and sign text. AI Builder requires Fabric API, runs on Fabric for 1.20.4 only and is released under the MIT License as open source. Files for 1.20.4 date from 2026-10-04 at version 1.6.0.
Key features
Natural language chat
An in-game chat opens with the K key and keeps up to 20 messages and 10 turns of history, with input capped at 1024 characters.
Blueprint import and export
Structures can be exported with block-entity data, including entities, and reloaded from .nbt, .litematic or MCBLUEPRINT v2 text files.
Restricted command set
The AI can only run its own actions, and commands at permission level 2 with root or server-administration effects are rejected.
Streaming replies
Responses stream in increments and a running blueprint request can be cancelled before it finishes.
Configurable keys
The chat key can be rebound under the AI Builder entry in the controls options, and screenshot capture is disabled by default.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
NBT Void is also a client-side Fabric mod for 1.20.1 – 1.20.4 under the MIT License, but it handles NBT viewing rather than AI chat. MineRemote is client-side only for 1.20.1 under a custom license and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| AI Builder - Minecraft AI Assistant | Fabric | 1.20.4 | Client and server | 2026-10-04 |
| NBT Void | Fabric | 1.20.1 – 1.20.4 | Client-side only | 2023-12-28 |
| MineRemote | Fabric | 1.20.1 | Client-side only | 2025-05-18 |
Questions
Does AI Builder need Fabric API?
Does the server need AI Builder installed?
Which AI services does AI Builder support?
Can the AI run any Minecraft command?
In the catalog
AI Builder - Minecraft AI Assistant is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 13,907 mods support Minecraft 1.20.4.
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What the author says
Requires Minecraft 1.20.4, Fabric Loader 0.15.0 or later, Java 17 or later, and Fabric API. Install those dependencies, place ai-builder-1.4.0.jar in.minecraft/mods/, then start the game and press K. You can also press K → AI Chat Settings. OpenAI-compatible APIs and Anthropic Messages APIs are supported…
Official listing
- Modrinth page
- modrinth.com/mod/ai-builder-minecraft-ai-assistant
- Owner
- liuzeen1234
- Published
- 2026-05-02
- Updated on Modrinth
- 2026-10-04
- Facts verified
- 2026-10-15