MPT-7B-StoryWriter is an open-source AI model from MosaicML developed specifically for generating long-form fiction. A common drawback among most narrative AIs is “amnesia” - they often forget supporting character names or world rules after just a few paragraphs. This model resolves that issue with a memory capacity (context window) reaching 65,000 tokens. This is equivalent to feeding an entire short novel into the AI at once, allowing it to remember every story detail without missing a beat.
For RPG or visual novel game developers, this capability removes major hurdles in narrative writing. You can copy entire world-building documents, faction histories, and character bios into a single prompt. Then, you can prompt it to draft dialogue or new branching storylines while ensuring they remain consistent with your core lore. Released under an Apache-2.0 license, this model is free to use and modify for commercial game projects with zero licensing fees.
How to get started (no coding skills required):
- Download and install the LM Studio desktop app on your computer; it is the easiest interface for running open-source AI models locally.
- Open the application, type “MPT-7B-StoryWriter” into the main search bar, and download the model version that fits your computer’s RAM specifications.
- Navigate to the Chat menu in the app, load the downloaded model, paste your extensive game world guide into the text box, and instruct the AI to generate new scenes or dialogue.
Visit the official website: MPT-7B-StoryWriter
Read the previous tool in this series: AI Game Dev Catalog (22/35): HuggingChat - A Free Chat Interface to Test Open-Source AI Models
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