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GPT-2 Powered Conversational AI Plugin for Unreal Engine (Offline temporarily)

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This plugin was developed using the GPT-4 model provided by OpenAI and it's powered by GPT-2.

  • Supported Platforms
  • Supported Engine Versions
  • Download Type
    Engine Plugin
    This product contains a code plugin, complete with pre-built binaries and all its source code that integrates with Unreal Engine, which can be installed to an engine version of your choice then enabled on a per-project basis.

(model is temporarily offline for a model upgrade)

I apologize for the inconvenience, but the plugin server is currently undergoing a temporary downtime due to an ongoing model upgrade. I am working diligently to enhance the performance and capabilities of the model to provide an even better user experience. During this upgrade, the server may be temporarily offline, but rest assured that I'm actively working to complete the upgrade as quickly as possible. I appreciate your patience and understanding, and I look forward to bringing you an improved and enhanced model very soon. Thank you for your continued support!

Update: The newest model upgrade is complete! It's coming to the store as GPT-3 NPC Conversational plugin. Contact me for a discount if you've purchased the GPT-2 plugin as well. The GPT-3 plugin is greatly upgraded. It should be in the store very soon after Unreal approves of it, possibly tomorrow.

Chat Ai GPT-3 Demo

Demonstration Video:

(New!) Vocal Ai output demonstration (Using plugin AzSpeech for vocal response from Ai):

Note: No OpenAi API key needed for this plugin. This plugin is unique because it runs on an external downloaded model from HuggingFace. It'll be free to use for life after purchase.

Anti-expensive-API perspective/configuration: I'm honestly not a huge fan of sending more money to openai with every character sent to a chatbot. I feel using Ai chat models should be FREE and remain free from within your game engine. If you're interested in an infinite (no-cost) ai solution as a plugin for your games (with NPC conversational technology). This plugin is for you!

Kindly check the plugin's included documentation to learn the simple two step process to configure this plugin.

And read on for more details on how you can combine the chatbox with a collision box for a simple toggle solution too.

Just click enable plugin, then select "documentation" from Unreal's beautiful plugin interface!

This plugin is based on the GPT2 model that stems from OpenAi's current revolutionary model GPT4.

The journey from GPT-2 to GPT-4 has been marked by incredible advancements in the field of artificial intelligence. GPT-4 builds upon the revolutionary GPT-2 model, pushing the boundaries of what is possible in natural language understanding, generation, and contextual awareness. With this plugin, you can harness the full potential of GPT-4, bringing a new level of depth and realism to your projects.


This plugin was developed using the GPT-4 model provided by OpenAI. We would like to express our gratitude to OpenAI for their groundbreaking work in artificial intelligence research and for making these advanced models accessible to developers around the world.


This plugin is not affiliated with or endorsed by OpenAI. Please ensure that you follow OpenAI's usage policies and guidelines when incorporating their models into your projects

Technical Details

Code Modules: GPTai [Runtime]

Number of Blueprints: One widget to be added to your viewport.

Number of C++ Classes: eight total - (Connection to Flask server, sending input, receiving output)

Network Replicated: No

Supported Development Platforms: Windows 10, Windows 11, Mac OS, Linux

Supported Target Build Platforms: Windows 10, Windows 11, Mac OS Linux

Documentation: Included with the plugin in a text file

Example Project:

Important/Additional Notes: I hope you enjoy conversing with your NPC using this plugin. I've had multiple discussions with GPT-2 as well. It's in fact the first GPT engine model that can explain why a joke is funny. Which is why it's always sort of sarcastic.