Nimbz/Prosopon-31B

VISIONConcurrent Unit Cost:2Model Size:31BQuant:FP8Context Size:32kTool Calling:SupportedPublished:Jul 6, 2026License:apache-2.0Architecture:Transformer0.0K Open Weights Featherless Exclusive Cold

Nimbz/Prosopon-31B is a 31 billion parameter merged language model based on the Gemma 4 architecture, developed by Nimbz. It is specifically designed for character adherence, natural human-feel reasoning, and highly creative prose with varied writing styles. The model excels at immersive roleplay and maintaining context stability, making it suitable for applications requiring dynamic and believable character interactions.

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Overview

Nimbz/Prosopon-31B is a 31 billion parameter merged language model built upon the Gemma 4 architecture. Its development involved a unique "four acts" merging process, culminating in an lm_head transplant from Pantheon-Reasoning-1.1, which gives the model its distinct voice and reasoning capabilities. The model aims to provide significant variation in persona representation and writing style without compromising prompt adherence or genuine character portrayal.

Key Capabilities

  • Character Adherence & In-Persona: Designed to maintain consistent character traits and personas, making it ideal for roleplay and character-driven narratives.
  • Natural Human-Feel Reasoning: Focuses on delivering reasoning that feels intuitive and human-like, including "between-the-lines" perception.
  • Creative Prose & Varied Writing Styles: Capable of generating highly creative text with diverse stylistic elements, enhancing narrative variance.
  • Immersive & Variable Swipes: Offers immersive and dynamic conversational turns with a distinct feel.
  • Context Stability: Engineered to maintain coherence and stability over extended contexts, crucial for long-form interactions.

Good For

  • Roleplaying Applications: Excels in scenarios requiring deep character embodiment and consistent persona maintenance.
  • Creative Writing & Story Generation: Suitable for generating varied and imaginative prose, narratives, and dialogue.
  • Conversational AI: Provides natural and engaging conversational experiences with a focus on character and reasoning.
  • Interactive Fiction: Its ability to handle complex personas and maintain context makes it well-suited for interactive storytelling.

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2 models