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Google: Gemini 3.1 Pro Preview Custom Tools

DEVELOPED BY: Google • LAST UPDATED: 7/4/2026

Compare Model
CCI (Capability)81.5Consensus: Contested ⚠
Context Window1.0MMax token length
In/Out Pricing$2/$12Blended cost/1M: $4.50
Pulse (Popularity)45/100Adoption + discussion proxy

Model Description

OpenRouter model gateway for Google: Gemini 3.1 Pro Preview Custom Tools.

Domain Averages

Reasoning84%
Coding71.1%
Math93.9%
Preference77.1%

Jury & Benchmark Signals

Source / HarnessScore
GPQA-Diamond68.2%
Humanity's Last Exam62.8%
MMLU-Pro86.1%
SWE-bench Verified42.5%
LiveCodeBench54.1%
AIME79.5%
LMArena style-controlled Elo1262

Consensus Discrepancy (Spread: 27.9 pts)

Source
Normalized
CCI Dev.
GPQA-Diamond
85.5
+4
Humanity's Last Exam
87.7
+6.2
MMLU-Pro
78.7
-2.8
SWE-bench Verified
66
-15.5
LiveCodeBench
76.2
-5.3
AIME
93.9
+12.4
LMArena style-controlled Elo
77.1
-4.4

Supported Modalities

INPUT:
textimage
OUTPUT:
text

Search Tags

#multimodal#reasoning#agentic

How to Use This Model

Python SDK Integration:
import openai

client = openai.OpenAI(
  base_url="https://openrouter.ai/api/v1",
  api_key="YOUR_OPENROUTER_KEY"
)

response = client.chat.completions.create(
  model="google/gemini-3.1-pro-preview-customtools",
  messages=[
    {"role": "user", "content": "Explain quantum entanglement in 1 sentence."}
  ]
)
cURL Terminal Request:
curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3.1-pro-preview-customtools",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

Community Debates & Mentions (0)

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