AI model
google/gemini-3.1-pro-preview
Google: Gemini 3.1 Pro Preview is a 1,048,576-token model served on Composite at $1.25 per million tokens in and $7.50 per million tokens out. Ranked #55 of 179 models by traffic on Composite over the last 30 days, taking 0.12% of tokens and 0.04% of requests.
Try in Playground| Model ID | google/gemini-3.1-pro-preview |
|---|---|
| Provider | |
| Context window | 1,048,576 tokens |
| Accepts | audio, file, image, text, video |
| Returns | text |
| Input price | $1.25 per million tokens |
| Output price | $7.50 per million tokens |
| Prompt caching | Supported — cached input is billed at the provider's cache rate, on credits and plans alike |
| Image input | $0.0000012 per image |
| Audio input | $0.0000012 per second |
| Reasoning tokens | $7.50 per million tokens |
| Web search | $0.0175 per result |
| Thinking | Always on for this model |
| Moderated | No |
| Cost on a monthly plan | About 14 plan credits per typical call (8k in, 1k out) |
| Routing endpoints | 2 (base plus 1 routing variant) |
Make a Composite API key and type google/gemini-3.1-pro-preview as the model name. JanitorAI takes the full URL https://composite.lucidity.sh/v1/chat/completions; SillyTavern, ChubAI, Agnai and RisuAI take https://composite.lucidity.sh/v1. It runs on credits, a plan, or your own provider key.
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#55 of 179
0.12% of tokens and 0.04% of requests over 30 days.
The same model behind 1 alternative endpoint. Call the id directly to pin a route; the base id above picks for you.
| Route | Model ID | Provider | Price |
|---|---|---|---|
| cheapThink | google/gemini-3.1-pro-preview:cheapThink |
$1.25 per million tokens input · $7.50 per million tokens output |
$1.25 per million tokens input · $7.50 per million tokens output
Credits pay the provider’s price plus 25%; cache hits cost less.
On a monthly plan, a typical call (8k tokens in, 1k out) uses about 14 plan credits, at the provider's own price.
Gemini models combine large context windows with fast throughput, which keeps response times low even in busy group chats.
With a 1,048,576-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.
It sits in the mid-range on price, a reasonable pick for regular roleplay use without going for the cheapest option available.
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...
Supplied by Google, not written by Composite.
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