LocoAI - best free AI Blueprint editor assistant for UE5
Describe what you want inside your Unreal Editor, and the plugin builds it.
Stop spending days prototyping a mechanic you might cut in review. Describe the system. Test it today. Decide tomorrow.
LocoAI is an AI-powered editor assistant for Unreal Engine 5. Tell it what to build (Blueprints, Widgets, Materials, Levels) and it builds them directly inside your project through reflection and the MCP protocol. The AI does not get tired. You spend less time wiring and more time designing.
What It Builds Directly Inside Your Editor
Every major UE5 system, mutated through reflection, not generated as text you paste somewhere:
Blueprints: Actor, Pawn, Character, GameMode, PlayerController
Widget Blueprints: UMG with full tree construction and ready-made style presets
Components: mesh, collision, audio, physics, camera, light
Materials & Material Instances: parameters, textures, vectors
Enhanced Input: Mapping Contexts and Input Actions wired in one call
Level Actors: spawn, transform, attach, configure Lighting & Sky Atmosphere
Audio: 2D / 3D, AudioComponents, SoundCues, Animation Sequences & Montages
Physics: impulse, gravity, mass, damping
Camera control: FOV, view targets, blends
Six One-Prompt Gameplay Templates
Pick one and the AI builds the whole graph:
Pickup: overlap collision, counter on the character, destroy on collect
Damage: AnyDamage event, clamped health, death branch
Raycast interaction: input action, line trace, hit response
Enemy: contact damage, health, reward drop on death
Spawner: timer, random point in radius, SpawnActor
HUD widget tree: health bar, score, ammo, anchored and styled
More added every week. Community templates are also available.
Why It Works
Generic AI improvises. LocoAI knows the patterns.
Knows which exact Blueprint node you mean, even when the name is ambiguous. Picks the right one and shows you what it placed, so you never wonder what just happened to your graph.
Before touching your Blueprint, checks that everything is in order. If something is missing, tells you exactly what to add first instead of breaking your project silently.
After every change, checks that your logic actually runs at runtime, not just compiles. Disconnected nodes and broken chains are flagged before you hit Play.
When a name is ambiguous, researches the Engine source instead of guessing.
The connection between the AI and your editor is stable.
Built by a UE5 educator. Not just a plugin programmer.
LocoAI is built by LocoDev, +18K subscribers on YouTube, +6k on Patreon. Built by someone who teaches Unreal full-time, hits the same Blueprint walls every student hits, and got tired of watching them quit at the same wall.
When you report a bug on Discord, the person who replies is the person who wrote the code. Most issues ship a fix within 24 hours. If you get stuck during setup, message on Discord - that is included, not a paid tier.
Free, With Bring-Your-Own-Key
The plugin itself is free. Bring your own API key: Anthropic, OpenAI, Groq, OpenRouter, or Google Gemini (most providers have free tiers). Claude Code CLI, Codex CLI, and local Ollama also connect directly.
Free plan includes:
500 prompts per month
Both Default and Light themes
6 gameplay templates
10 custom rules per project
Read-only community prompt library
50 prompt polishes per month.
Premium tier ($10/month, coming Q2 2026) is sold separately at ai.locodev.dev - not through Fab.
Honest Disclosure Before You Install
This is BETA. Active development means rapid improvements. It also means occasional rough edges. Updates ship daily. Issues raised on Discord are usually fixed the same day.
Results depend on your AI model. LocoAI prompts are tuned for Claude Sonnet and Opus. Run it on a weaker model and the output reflects that - that is not a plugin limitation.
Editor-only plugin. It does not ship with packaged builds. It builds your assets at edit time; the assets ship like any other Unreal content.
Dependencies (auto-enabled by Loco AI)
LocoAI depends on two stock Unreal Engine plugins that ship with the editor - no external downloads required:
PythonScriptPlugin - powers the optional execute_python tool used for level-actor manipulation flows.
EnhancedInput - required by the in-editor chat panel keybind hook.
Both plugins are auto-enabled when LocoAI is enabled in your project.