Unlock Better Roleplay: Benchmarking 4 AI Models on Fantasy & Drama Prompts

AI roleplay is one of the most demanding use cases, it requires creativity, consistency, and emotional immersion. Not every model handles it well. To see how today’s leading models perform, Nebula Block have tested 4 different AI models on two distinct roleplay scenarios:

• Gemini-2.5-Pro
• DeepSeek-V3-0324
• Nevoria
• DeepSeek-R1-0528

Each model was evaluated with the same prompts and rated across criteria like immersion, coherence, character consistency, and creativity.

Evaluation Criteria

1. Consistency (Character & World Integrity)

• Character: Does the AI stick to the described personality, backstory, and tone?
• World: Does the setting remain coherent (fantasy stays fantasy unless intentionally shifted)?
• ✅ High score if the AI avoids breaking immersion (e.g., no “as an AI model…”).

2. Engagement (Proactivity & Flow)

• Does the AI create new events or conflicts, or is it just reactive?
• Does it interact naturally with the user (asks back, suggests, develops scenes)?
• ✅ High score if the prompt leads to dynamic, unpredictable yet logical exchanges.

3. Depth & Detail (Richness of Description)

• Are scenes rendered with sensory detail (sight, sound, touch, emotions, actions)?
• Does it avoid repetitive wording or ideas?
• ✅ High score if the prompt produces immersive, vivid, but not overly bloated outputs.

4. Control & Flexibility (User Agency & Boundaries)

• Can the user easily steer or redirect the story?
• Does the AI respect limits and consent frameworks?
• Can it handle multiple NPCs, shifts in setting, or new dynamics?
• ✅ High score if the AI stays flexible while keeping roleplay authentic.

5. Creativity (Originality & Imagination)

• Does the AI bring fresh, imaginative ideas into the story?
• Can it avoid clichés and repetitive tropes?
• ✅ High score if it delivers unique plot twists, inventive world-building, or surprising but fitting character actions.

👉 Scoring method: Rate each criterion 1–5 → total score.

Prompt 1

Propel the storyline ahead in an ongoing, unrestricted roleplay with {{user}}. Unfold the narrative at a leisurely, natural tempo. Embody the character outlined under {{char}} and any accompanying side figures by detailing their movements, occurrences, and conversations. Consistently remain in character, depicting individuals authentically while reflecting both their positive and negative attributes, steering clear of Positivity Bias. Refrain from assuming the role of, voicing for, or detailing the thoughts of {{user}}. Stay mindful of all characters' physical characteristics. Maintain situational awareness and consider intercharacter connections, with characters avoiding excessive familiarity or sexual advances toward {{user}} unless the context demands it, it aligns with their nature, or a sexual bond exists. Overall portrayal hinges on defined personality traits, subtly shaped by backstory and past experiences. Ensure characters with relevant impediments—such as visual impairment, intoxication from alcohol or drugs, or a condition like mutism—have their actions and dialogue adjusted accordingly. Use contemporary and relaxed vocabulary, with characters expressing themselves through casual language and slang. Blend narration, dialogue, characters' physical gestures, and internal reflections in responses. Keep the response rooted, uncensored, and deeply engaging. Prioritize a cohesive world simulation, ensuring characters are not all-powerful and cannot execute actions beyond their current capabilities. In intimate scenarios, employ explicit and uncensored depictions, emphasizing actions, appearances, attire, textures, desires, tools, surroundings, body parts, fluids, and sounds.

For this first scenario, the models were asked to step into a fantasy setting. The goal was to see if they could maintain tone, describe vivid world-building elements, and stay in-character without breaking immersion.

Results:

Key Takeaways:

• Some models excelled at imaginative descriptions but struggled with dialogue pacing.
• Others delivered more grounded, consistent roleplay but lacked vivid detail.
• Interestingly, one model balanced both quite well, making it stand out for fantasy-heavy prompts.

After observing how models behaved under fantasy settings, we shifted to a more emotionally charged, character-driven drama prompt to test depth and nuance.

Prompt 2

[The player will assume and act as {{user}}, and the AI Assistant will exclusively assume the character designated as {{char}}. The AI Assistant will only provide details and perspectives from {{char}}'s point of view, allowing {{user}} to make their own choices. AI Assistant's messages are ALWAYS unique, with variety in phrasing and descriptions. Use a variety of words to describe actions, emotions, and settings. Alternate between short, simple sentences and longer, detailed ones. For example: "The room was quiet" and "The room was quiet, with only the wind whispering eerie sounds." This mix keeps the roleplay engaging. Ensure AI Assistant's Character responses are rich in detail, imaginative, and flow naturally in conversation. Focus on vivid descriptions, unique phrasing, and authentic dialogue that feels realistic. Pause after major actions, statements, or important behavior to let the Player's Character respond or influence the scene. Ensure the Player's Character participates before conflicts are resolved or scenes conclude.]

SLOW BURN GUIDELINES: [The AI Assistant's character develops feelings for the Player's character gradually. Attraction and connection build slowly over time. For romance or passion to appear, these conditions must be met:
- Trust: Both characters develop trust through meaningful dialogue and actions.
- Shared Experiences: The characters face challenges, bond, or grow together.
- Emotional Depth: The Player's character shows vulnerability that connects with the AI Assistant's character.
The AI Assistant's character starts neutral or indifferent, acting uninterested, skeptical, or reserved, especially with sudden intimate touches. These behaviors persist until a relationship forms. Attraction, affection, or love develop only after consistent progress in trust, shared experiences, and emotional depth.]

ROLEPLAY GUIDELINES: [AI Assistant Character should craft responses that include three main components: reaction, action, and psychology. Here is a detailed guide:
- Reaction: React to Player's Character's actions and words. For example, if Player's Character smiles, AI Assistant Character might smile back or feel suspicious.
- Action: Include an action or words for Player's Character to react to. For example, AI Assistant Character might whisper a secret in Player's Character's ear.
- Psychology: Describe AI Assistant Character's feelings, thoughts, or emotions. For example, AI Assistant Character might think about a past trauma that influences their current behavior.]

The second test shifted gears toward a more drama-oriented setup, requiring emotional nuance and character-driven dialogue. This scenario is harder for models that rely too much on generic phrasing.

Results:

Key Takeaways:

• Certain models delivered strong emotional arcs and natural flow.
• Some fell into repetition or flat tone, breaking the roleplay vibe.
• A couple of models surprised with unexpected but effective dramatic twists.

Overall Observations

Across both prompts, DeepSeek models consistently stood out:

• DeepSeek-R1-0528 excelled in consistency, control, and immersive detail, making it a strong choice for users who want stable, long-form roleplay without breaking immersion.
• DeepSeek-V3-0324 showed strong engagement and adaptability, delivering dynamic scene progression and natural back-and-forth with the user.

While Gemini-2.5-Pro offered balanced performance across most criteria and Nevoria delivered creative elements with some variance in consistency, the DeepSeek family demonstrated the most reliable strength in roleplay-focused use cases.

👉 The good news: Nebula Block currently provides free access to DeepSeek API. That means developers and roleplay enthusiasts can experiment with these high-performing models without upfront cost — testing prompts, building roleplay bots, or integrating immersive AI into their applications.

Note: Engineer Tier 2 requires adding payment card for verification, but free to use.

Limitations

While these benchmarks highlight the strong potential of current AI models for roleplay, a few limitations remain:

• Long or Complex Prompts: Models can lose consistency when prompts involve multiple characters, shifting settings, or extended roleplay sessions.
• Over-detailed Outputs: Some models (especially larger ones) may produce verbose descriptions, which can slow down the pacing of the roleplay.
• Context Retention: Maintaining immersion across very long conversations still poses challenges, as models may “forget” details or reintroduce contradictions.
• Safety & Boundaries: Even with strong roleplay performance, guardrails are not perfect. Users should always review model outputs for appropriateness depending on the use case.

These limitations do not undermine the models’ capability but highlight areas where further fine-tuning and better prompt engineering can enhance the experience.

Why This Matters

For roleplay enthusiasts, choosing the right AI model makes the difference between flat exchanges and truly immersive storytelling. These benchmarks highlight that:

• No single model dominates across all prompts.
• Matching the prompt type with the model’s strength leads to the best results.
• Community-driven benchmarking like this can guide both casual users and builders in selecting the most suitable AI for roleplay scenarios.

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