Gemini 3.1 Pro Preview Proxy for Janitor AI and SillyTavern with MegaNova Setup Guide

Looking to use Google's latest Gemini 3.1 Pro Preview on Janitor AI? This guide walks you through connecting Gemini 3.1 Pro Preview to Janitor AI using MegaNova AI Proxy — so you can start chatting with smarter reasoning, deeper context, and more consistent characters in just a few minutes.

What Is Gemini 3.1 Pro Preview?

Gemini 3.1 Pro Preview is Google's newest flagship model, released on February 19, 2026. It's the first "point one" incremental update to the Gemini 3 series, and it brings major improvements to reasoning, long-context stability, and multimodal understanding — all while keeping the same affordable pricing as Gemini 3 Pro.

For roleplay and character AI, that translates into more natural dialogue, stronger emotional nuance, and characters that actually remember what happened 50 messages ago.

What Makes Gemini 3.1 Pro Preview Stand Out for Roleplay?

Three-Tier Thinking System

Gemini 3.1 Pro Preview introduces a three-tier thinking system — low, medium, and high — that lets the model scale its reasoning effort dynamically. For quick back-and-forth banter, it responds fast. For complex, emotionally layered scenes, it takes the time to think deeper. This means your characters can handle casual conversations and intense dramatic moments equally well, all within a single model.

Massive 1 Million Token Context Window

With support for up to 1 million input tokens, Gemini 3.1 Pro Preview can hold incredibly long conversations without losing track of earlier details. Character backstories, relationship dynamics, and plot threads stay intact across extended sessions — making it one of the best models available for long-form roleplay and persistent storytelling.

Record-Breaking Reasoning

On the ARC-AGI-2 benchmark, Gemini 3.1 Pro Preview scored 77.1% — more than double what Gemini 3 Pro achieved. This isn't just a number on a leaderboard. In practice, it means sharper deductions, more coherent plot development, and characters that respond with genuine situational awareness rather than generic filler.

Stronger Multimodal Understanding

Gemini 3.1 Pro Preview handles text, images, video, audio, PDFs, and code within a single model. While text-based roleplay is the primary use case on Janitor AI, this multimodal backbone gives the model a richer understanding of context and nuance that carries over into its text generation quality.

Improved Long-Context Stability

Where many models start to drift or forget details after a few dozen messages, Gemini 3.1 Pro Preview maintains consistent memory and personality throughout extended conversations. Characters stay grounded. Plotlines stay on track. The model doesn't suddenly forget your character's name or motivation halfway through a scene.

Why Use MegaNova as Your Proxy?

MegaNova AI Proxy gives you access to Gemini 3.1 Pro Preview through a unified OpenAI-compatible API endpoint — no need to manage Google Cloud credentials or deal with complex API configurations. Here's why it's the easiest way to connect:

• Simple setup — One API key, one base URL, and you're connected.
• Cost-effective — MegaNova offers competitive pricing, often 70–90% cheaper than going direct through other providers.
• Fast inference — Sub-500ms latency globally with no cold starts.
• Full Janitor AI compatibility — Works seamlessly with Janitor AI's proxy configuration.
• Flexible payment — Pay-as-you-go via PayPal, Visa, Mastercard, or Stripe. Only pay for what you use.

Step-by-Step Setup: Connect Gemini 3.1 Pro Preview to Janitor AI

Step 1: Create Your MegaNova Account

1. Visit meganova.ai and sign up for a free account if you don't already have one.
2. Once logged in, navigate to the API Keys section in your dashboard.
3. Click Create New Key and copy your API key. Keep it somewhere safe — you'll need it in a moment.

Step 2: Add Funds (If Needed)

• Gemini 3.1 Pro Preview is a premium model. Make sure your account has funds loaded.
• You can deposit as little as $1 to unlock Tier 2 (Creator) access and start using the model immediately.
• Payment options include PayPal, Visa, Mastercard, and Stripe.

Step 3: Configure Janitor AI

1. Open Janitor AI and pick a character you want to chat with.
2. Go to Settings (gear icon).
3. Under API Settings, select "Using Proxy" as your API type.
4. Enter the following details:

5. Click Save and start chatting.

That's it — you're now running Gemini 3.1 Pro Preview through Janitor AI.

Using with SillyTavern

For SillyTavern users:

1. Open SillyTavern → API Connections

2. Select "Custom (OpenAI-compatible)"

3. Base URL: https://api.meganova.ai/v1

4. API Key: Your MegaNova key

5. Model: gemini/gemini-3.1-pro-preview

Recommended Settings

Getting the best results from Gemini 3.1 Pro Preview on Janitor AI comes down to dialing in a few key parameters:

• Max Tokens: Set between 800–1500 for stable, detailed responses. Gemini 3.1 Pro Preview supports up to 64,000 output tokens, but keeping this in a moderate range prevents overly long or rambling outputs during roleplay.
• Temperature: Keep it at 0.7–0.9 for a good balance between creativity and coherence. Lower values (0.5–0.7) work well for serious, grounded characters. Higher values (0.9–1.1) suit more expressive or chaotic personalities.
• Top P: Leave at 0.95 (default) for most use cases.
• Frequency Penalty: A light penalty of 0.1–0.3 helps prevent repetitive phrasing across long sessions.

Pro Tip

Gemini 3.1 Pro Preview's three-tier thinking system means it naturally adjusts its reasoning depth based on the complexity of the input. You don't need to manage this manually — just write detailed, well-structured character definitions and the model will match the effort.

Troubleshooting

No API Access or 401 Error Make sure your MegaNova account is funded and your API key is entered correctly. Some models require Tier 2 (Creator) access — deposit at least $1 to unlock it.

Character Drift Over Long Sessions While Gemini 3.1 Pro Preview has excellent long-context stability, extremely long sessions (500+ messages) may still see some drift. Re-anchor your character by including key personality traits and behavioral rules in your character's system prompt.

Slow Responses Gemini 3.1 Pro Preview prioritizes reasoning quality. If you notice slightly slower responses compared to lighter models, that's the model taking time to produce higher-quality output. This is especially true during complex scenes or when the thinking tier scales up to "high."

Model Not Found Error Double-check that you've entered the model name exactly as gemini-3.1-pro-preview — spelling and capitalization matter.

Need Help? If you're stuck, MegaNova's support team is available on Discord. The community is active and typically responds quickly.

Who Is Gemini 3.1 Pro Preview Best For?

Gemini 3.1 Pro Preview via MegaNova Proxy is an excellent choice for users who want:

• Long-form storytelling — The 1M token context window means your stories can span hundreds of messages without the model losing the thread.
• Complex, multi-character narratives — The improved reasoning handles intricate plot dynamics and multiple character perspectives with ease.
• Emotionally nuanced roleplay — The three-tier thinking system means the model invests more effort in moments that matter, producing richer emotional responses during dramatic scenes.
• Consistent, grounded characters — Improved long-context stability keeps personalities stable and behaviors predictable, even deep into a conversation.
• Cost-conscious creators — At the same pricing as Gemini 3 Pro, you get dramatically better performance without paying more.

If you've been using Gemini 3 Pro or Gemini 2.5 Pro on MegaNova, upgrading to Gemini 3.1 Pro Preview is a straightforward improvement across the board — better reasoning, better memory, and better character consistency at the same price point.

Start Chatting Now

Ready to try Gemini 3.1 Pro Preview on Janitor AI?

👉 Sign up for MegaNova AI — grab your API key and connect in under 2 minutes.

👉 View Gemini 3.1 Pro Preview on MegaNova — see model details and pricing.

👉 Join the MegaNova Discord — get help, share tips, and connect with other creators.