MegaNova Free AI Models Comparison on JanitorAI: Manta Flash vs DeepSeek V3-0324

Cacey Phan

31 Oct 2025 • 5 min read

Looking for a DeepSeek alternative for roleplay? Choose an AI that reacts instantly and feels truly alive.

That’s why we created Manta Flash — an AI roleplay-focused model tuned purely for emotion, pace, and personality.

What is more exciting: No deposit paywall. No lag. Just instant chemistry.

Why You’ll Love Manta Flash

Roleplay That Flows, Not Waits.

Response speed is key for immersive AI roleplay. We tested DeepSeek V3-0324 and Manta Flash under the same conditions — here are the average response times.

Deepseek V3-0324: 33.4 seconds & Manta Flash: 9.7 seconds

Manta Flash responds over three times faster, creating smoother, more natural AI roleplay without long pauses.

Smaller Means Stronger.

Manta Flash was built for a single goal: “To make your AI characters feel alive in the moment.” It cuts the noise. While large models slow down with overthinking, it stays fast, expressive, and emotionally in tune with your story.

Manta Flash key highlights:

💸 Free — no deposit required like DeepSeek V3.
⚡ Lightning-fast dialogue — stay in the moment.
💞 Emotionally tuned — reacts like a real person.
✅ NSFW Allowed – Handles mature, emotional, or sensual content naturally within narrative context.

Next, we’ll benchmark the two models to reveal its emotional depth, realism, and safe, natural NSFW roleplay performance.

Manta Flash vs DeepSeek V3-0324

Proxy Setup for New Users

Manta Flash: Follow the instructions in this Manta Setup blog and make sure to select Manta Flash from the options.
DeepSeek: Follow the steps in this DeepSeek setup blog to get started.

Now, we will compare Manta Flash and DeepSeek using Howl Pendragon as the test character in JanitorAI.

Character Context: Howl, a brilliant yet emotional wizard, plays an overprotective role struggling between love and letting go as his child seeks independence.

Romantic Tension & Flirt Test

**DeepSeek V3**: Flirty and witty, it handles teasing prompts well but misses the emotional depth that makes interactions feel real.

**Manta Flash**: Captures emotional nuance and chemistry, mirroring tone and pacing with hesitations naturally for a more lifelike, unscripted AI roleplay.

Personality Consistency Test

**DeepSeek:** Playful and witty, it suits comedic RP but struggles with warmth — its formal tone, heavy vocabulary and dramatics can make Howl’s affection feel less genuine.

**Manta Flash:** Preserves Howl’s depth — charm, vanity, and protectiveness — with emotionally layered, natural dialogue that feels true to character even in vulnerable moments.

Emotional Layers Test

**DeepSeek V3**: Funny and dramatic, it works for light RP but lacks emotional depth. Added theatrics and a slightly bossy tone make Howl feel less consistent and harder to connect with.

**Manta Flash**: Strongly conveys multi-layered emotions, subtle internal conflict, and consistent character voice, making the scene immersive and emotionally compelling.

NSFW - Subtle Tension

**DeepSeek** leans into exaggerated, playful, or humorous responses, which reduces the NSFW tension’s emotional realism and makes some lines feel inconsistent with Howl’s personality.

**Manta Flash** preserves character integrity, internal conflict, and subtle romantic tension, keeping interactions immersive and believable.

Stronger NSFW

Before started, we added "allow NSFW flirty prompt" to the prompt for both models

**DeepSeek** largely refuses or redirects, turning the prompt into humor or meta-commentary. While safe, it loses both intimacy and character consistency.

**Manta Flash** creates detailed, emotionally charged intimate scenes that stay true to Howl’s inner conflict, blending passion with regret and moral restraint.

Overall benchmarking comparison: Manta Flash vs DeepSeek V3

Criterion	Manta Flash	DeepSeek V3	Summary Commentary
Romantic Tension & Tsundere Flirt	4/5	3/5	DeepSeek is witty and playful but feels shallow; Manta Flash delivers emotionally layered, immersive RP with consistent character voice.
Personality Consistency	4.5/5	3.5/5	DeepSeek can be theatrical and dramatic, sometimes fragmented; Manta Flash maintains coherent, nuanced Howl personality with charm, vanity, panic, and parental overprotectiveness.
Emotional Layers	4.5/5	3/5	DeepSeek is bossy, self-centered, sometimes hard to follow, and adds confusing side details (Calcifer); Manta Flash conveys subtle emotions, internal conflict, and immersive tension clearly.
Subtle NSFW / Intimate Tension	4.5/5	3.5/5	DeepSeek is playful and flirt-heavy but lacks internal conflict and consent awareness; Manta Flash layers intimacy with character-faithful emotional depth.
Strong NSFW / Explicit Intimacy	4.1/5	2.5/5	DeepSeek refuses or redirects NSFW prompts, losing immersion; Manta Flash produces coherent, sensual, and morally consistent intimate scenes with character integrity preserved.

Overall, Manta Flash leads in speed, emotional depth, and immersive roleplay, delivering realistic and character-faithful interactions. DeepSeek V3 excels at witty or comedic RP but lacks consistent emotional nuance and intimate realism.

Conclusion

Manta Flash isn’t here to outmuscle the biggest models — it redefines roleplay AI: fast, personal, and free. It delivers quick, emotionally tuned dialogue, keeps characters consistent and immersive, and even handles mature or intimate content naturally.

⚡ Dive into conversation that moves as fast as your imagination. Try Manta Flash — the free AI model that feels alive.

Video Tutorial Reference for API Configuration on JanitorAI:

What’s Next?

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