Unity AI Assistant vs MCP for Unity: built-in agent or bring your own?
Pick Unity AI Assistant for a ready-made in-editor agent on Unity 6 paid through Pro or $10/mo plus credits; pick MCP for Unity to drive the editor free with the AI agent you already use, on Unity 2021.3 or newer.
Both let an AI agent work inside the Unity Editor: inspect your scene, change GameObjects and edit scripts. Unity AI Assistant is Unity's own in-editor agent, running third-party models on Unity credits, and needs Unity 6.0 or newer. MCP for Unity is a free, MIT-licensed bridge from Coplay that brings no AI of its own: you connect Claude Code, Cursor, VS Code or a local model, and it supports Unity 2021.3 LTS through 6.x.
Full reviews: Unity AI Assistant · MCP for Unity
| Unity AI Assistant | MCP for Unity | |
|---|---|---|
| Can you ship it? | Paid plan needed Unity allows selling games made with it; Personal needs $10/mo after the trial. Source | Yes, free tier MIT-licensed tool; your AI agent's own terms still apply Source |
| Best for | An agent built into the Unity Editor that can see your scene | Letting Claude Code, Cursor or a local model drive the Unity Editor |
| Confirmed features | Reads your whole project for context · Drives the editor (creates actors, scenes, assets) · Works with Unity · Uses MCP (connects to AI assistants or tools) · Choose or bring your own AI model | Writes and edits game code · Drives the editor (creates actors, scenes, assets) · Runs or plays the game to check its work · Works with Unity · Uses MCP (connects to AI assistants or tools) · Choose or bring your own AI model |
| Free option | Included with Unity Pro, Enterprise and Industry. Personal users get a free trial that converts to $10 a month, and the assistant spends credits as you use it. Unity's own MCP server, CLI and plugin are free. Source | Free and open source under the MIT license. You pay only for the AI agent or model you connect. Source |
| Price | Included with Unity Pro; Personal gets a free trial, then $10/mo. Extra credits sold separately | Free, open source (MIT) |
| Works with | Unity 6.0+ | Unity 2021.3 LTS to 6.x; MCP clients such as Claude Code, Cursor, VS Code |
| Maker | Unity | Coplay (maintained by Aura) |
| Last checked | Oct 23, 2026 (source) | Oct 29, 2026 (source) |
| Try it | Visit Unity AI Assistant | Visit MCP for Unity |
Pick Unity AI Assistant if…
You're on Unity 6, want an agent that already knows Unity and your scene without setting anything up, and you're fine paying through a Pro seat or the $10 Personal plan plus credits.
Pick MCP for Unity if…
You already pay for Claude Code, Cursor or another agent (or run a local model), want it to drive the editor for free, or you're on a Unity version older than 6.0.
Our verdicts
Unity AI Assistant
Unity's own in-editor agent: it inspects your scene, GameObjects and components, carries out editor actions and checks the result. You pick from third-party models and pay in credits. Still in beta, and Unity says it is meant for evaluation rather than full production. Your data isn't used for training unless you opt in, and generated assets are tagged as AI-made, so plan your store disclosure. Unity's MCP server and Claude Code/Codex plugin are free if you'd rather bring your own agent.
MCP for Unity
A free, MIT-licensed bridge that lets any MCP client (Claude Code, Cursor, VS Code, local models) work inside the Unity Editor: create scenes and GameObjects, edit and validate C# scripts, read the console, run tests and trigger builds. It brings no AI of its own, so you pay for whichever agent you connect, and its optional 3D, image and audio generation tools need your own Tripo, Meshy or fal.ai keys. The team behind it also sells Aura, a paid Unity and Unreal assistant.
See every code & engine pick. Prices change often, so confirm on each maker's site before you buy.
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