Gemini 3.1 Pro Preview Custom Tools with Jev
Gemini 3.1 Pro Preview Custom Tools is a model from Google, released 2026-02-25. It costs $2.00 per million input tokens and $12 per million output tokens, reads up to 1.05M tokens of context, and writes up to 65,536 tokens in one reply. Through llm11, set model to google/gemini-3.1-pro-preview-customtools.
- Input price
- $2.00 / 1M
- Output price
- $12 / 1M
- Context window
- 1.05M tokens
- Max output
- 66K tokens
- Cached input
- $0.200 / 1M
- Released
- 2026-02-25
- Accepts
- text, audio, image, video, file
Read from the provider's prompt cache
Read from the live catalogue and refreshed daily. At blended list price, 12% of the 332 priced models we can call cost more.
Using Gemini 3.1 Pro Preview Custom Tools with Jev
Jev is TypeSafe AI's System One model. It reads each request first and decides which model in your pool answers, with a calibrated confidence on that call. Gemini 3.1 Pro Preview Custom Tools does the answering when Jev sends it work, or when you name it yourself. Gemini 3.1 Pro Preview Custom Tools falls in the llm11-balanced band, and the labs and limits it meets make it eligible for that pack. Packs keep a spread of eight models per band, and it is not one of the eight today, so it is only picked when you name it in a custom pool.
Jev is new, so we have not published results for Gemini 3.1 Pro Preview Custom Tools with and without it, and this page does not invent any. Every response comes with a receipt that names the model that answered and what it cost against your most expensive model, so you can measure the pairing on your own traffic.
What a request costs
List price arithmetic, the same sum a receipt does. llm11 adds nothing per request; the only fee is on buying credits.
| Request | Tokens in / out | One | A thousand |
|---|---|---|---|
| Short chat turn | 500 / 200 | $0.00340 | $3.40 |
| Question over retrieved documents | 4,000 / 500 | $0.014 | $14.00 |
| Long document summary | 30,000 / 1,000 | $0.072 | $72.00 |
Cheaper models to try
The catalogue has no benchmark score for Gemini 3.1 Pro Preview Custom Tools, so this is a price ordering. It does not claim these answer as well.
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Cohere Command A | $2.50 | $10 | 256K | |
| Cohere Command R+ (08-2024) | $2.50 | $10 | 128K | |
| OpenAI GPT-4o | $2.50 | $10 | 128K | |
| Anthropic Claude Sonnet 5.5 | $2.00 | $10 | 1M |
Call it
Same OpenAI request shape. Naming the model pins it, so nothing is routed, and the answer is still checked.
python
from openai import OpenAI
client = OpenAI(base_url="https://www.llm11.com/v1", api_key="llm11_live_...")
res = client.chat.completions.create(
model="google/gemini-3.1-pro-preview-customtools",
messages=[{"role": "user", "content": "Hello"}],
)More from Google
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Gemini 3.8 Flash | $0.750 | $3.75 | 1.05M | |
| Gemini 3.7 Flash | $0.750 | $3.75 | 1.05M | |
| Gemini 3.5 Flash Lite | $0.300 | $2.50 | 1.05M | |
| Gemini 3.6 Flash | $0.750 | $3.75 | 1.05M | |
| Gemini 3.5 Flash | $1.50 | $9.00 | 1.05M | |
| Gemini 3.1 Flash Lite | $0.250 | $1.50 | 1.05M |
Questions
- What is Gemini 3.1 Pro Preview Custom Tools with Jev?
- Jev is TypeSafe AI's System One model. It reads each request first and decides which model in your pool answers, with a calibrated confidence on that call. Gemini 3.1 Pro Preview Custom Tools does the answering when Jev sends it work, or when you name it yourself. Gemini 3.1 Pro Preview Custom Tools falls in the llm11-balanced band, and the labs and limits it meets make it eligible for that pack. Packs keep a spread of eight models per band, and it is not one of the eight today, so it is only picked when you name it in a custom pool. Routing decisions are made by Jev, TypeSafe AI's System One model.
- Is Gemini 3.1 Pro Preview Custom Tools a System One model?
- No. Gemini 3.1 Pro Preview Custom Tools answers requests. The System One model is Jev, which decides which model answers each one, so the two do different jobs and llm11 uses both.
- How much does Gemini 3.1 Pro Preview Custom Tools cost?
- $2.00 per million input tokens and $12 per million output tokens. A 4,000 token prompt with a 500 token answer costs about $0.014, so a thousand of them is about $14.00. llm11 passes provider list price through and charges 5% when you buy credits.
- What is the Gemini 3.1 Pro Preview Custom Tools context window?
- 1,048,576 tokens, with up to 65,536 tokens in a single reply.
- Does Gemini 3.1 Pro Preview Custom Tools support tool calling and structured output?
- The catalogue lists tool calling, structured output and reasoning controls.
- Can I use Gemini 3.1 Pro Preview Custom Tools through llm11?
- Yes. Set model to google/gemini-3.1-pro-preview-customtools on the OpenAI-compatible endpoint and the request goes to it directly, with verification still running.
- Does Jev route to Gemini 3.1 Pro Preview Custom Tools?
- Routing decisions are made by Jev, TypeSafe AI's System One model. Gemini 3.1 Pro Preview Custom Tools falls in the llm11-balanced band, and the labs and limits it meets make it eligible for that pack. Packs keep a spread of eight models per band, and it is not one of the eight today, so it is only picked when you name it in a custom pool.
- What is a cheaper alternative to Gemini 3.1 Pro Preview Custom Tools?
- Nearest in price and below it: Cohere Command A at $2.50 in and $10 out, Cohere Command R+ (08-2024) at $2.50 in and $10 out and OpenAI GPT-4o at $2.50 in and $10 out. The catalogue has no benchmark score for Gemini 3.1 Pro Preview Custom Tools, so this is a price ordering. It does not claim these answer as well.