Gemini 3.1 Pro API

US Google | released 2026-06 | knowledge cutoff 2026-05

Gemini 3.1 Pro is Google’s flagship model with native multimodal understanding across text, images, audio, and video. It offers a very long context window and strong reasoning, making it versatile for complex multimodal workloads.

ImageVideoAudioReasoningTool UseJSON ModeFlagship

Pricing (official list, per 1M tokens)

Input

$2.00/M

Output

$12.00/M

Specifications

Context window1048.576K tokens Max output65.536K tokens Input modalitiesImage, Video, Audio StreamingYes APIOpenAI-compatible

How to use Gemini 3.1 Pro

Drop-in OpenAI replacement. Change only the base_url and model.

# Python -pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://meshtok.com/v1",
    api_key="sk-your-MeshTok-key",
)

resp = client.chat.completions.create(
    model="google/gemini-3.1-pro-preview",
    messages=[{"role":"user","content":"Hello!"}],
)
print(resp.choices[0].message.content)

# cURL
curl https://meshtok.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-MeshTok-key" \
  -H "Content-Type: application/json" \
  -d '{"model":"google/gemini-3.1-pro-preview","messages":[{"role":"user","content":"Hello!"}]}'