Gemini 3.1 Pro Preview Custom Tools

Tool callingStructured outputReasoningImage inputAudio inputVideo inputFile input

Model card Launch post Website Docs

Advanced Gemini model for complex reasoning, coding, and multimodal analysis

Context: 1.0M
Released: 7mo ago
Input / 1M tokens: $2.00
Output / 1M tokens: $12.00
Cached input / 1M tokens: $0.20
Cache write / 1M tokens: $0.38

Sources:models.devOpenRouter

Benchmarks

DeepSWE is the primary coding benchmark where an exact model evaluation exists. Other sourced evaluations appear below; missing scores are not zero.

Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.

Other published benchmarks

Evaluation	Reported score and source
SWE-Bench verified	75.6% Epoch AI · gemini-3.1-pro-preview-customtools Epoch AI evaluation

Benchmark compilation: Epoch AI, Capabilities & benchmarking (CC BY attribution). Scores are converted to percentages and model names matched to the Vertical Tabs catalog. Individual evaluations are credited to their original sources. External results may carry separate licences and evaluation configurations; do not interpret scores from different harnesses as directly comparable.

Specifications

Developer: Google DeepMind
Model family: Gemini
Type: Language model
Predecessor: —
Successor: —
Released: February 19, 2026
Model ID: google/gemini-3.1-pro-preview-customtools
Openness: Closed
License: —
Input modalities: text, audio, image, video, file
Output modalities: text
Modality: text+image+file+audio+video->text
Tokenizer: Gemini
Max output tokens: 66K
Knowledge cutoff: 2025-01
Hugging Face: —
Source freshness: Metadata synced Oct 8, 2026, 10:17 PM UTC

Additional source evidence

Source model: google/gemini-3.1-pro-preview-customtools
Source family: gemini-pro
Last updated: 2026-02-19
Knowledge cutoff: 2025-01
Model context: 1.0M
Model output limit: 66K
Open weights: No
File attachments: Yes
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
Temperature control: Yes

Complete source record (JSON)

{
  "id": "google/gemini-3.1-pro-preview-customtools",
  "name": "Gemini 3.1 Pro Preview Custom Tools",
  "description": "Advanced Gemini model for complex reasoning, coding, and multimodal analysis",
  "family": "gemini-pro",
  "last_updated": "2026-02-19",
  "knowledge": "2025-01",
  "attachment": true,
  "reasoning": true,
  "tool_call": true,
  "structured_output": true,
  "temperature": true,
  "modalities": {
    "input": [
      "text",
      "image",
      "video",
      "audio",
      "pdf"
    ],
    "output": [
      "text"
    ]
  },
  "limit": {
    "context": 1048576,
    "output": 65536
  },
  "release_date": "2026-02-19",
  "open_weights": false
}

Infrastructure

Provider availability

All providers

Provider	Endpoint	Context	Input /M tokens	Output /M tokens	Cached input /M tokens	Cache write /M tokens	Uptime 1d	Data handling
Google AI Studio	google-ai-studio	1.0M	$2.00	$12.00	$0.20	$0.38	100.00%	ZDR: No Training: Unknown Prompt logging: Unknown Retention: Unknown ZDR source Privacy policy Checked 2026-10-15

Provider data:OpenRouter

Text provenance

Gemini app/web

Google SynthID text watermarking

Google DeepMind says text generated in the Gemini app and web experience is watermarked with SynthID by adjusting token probabilities.

Official explanation