Google: Gemini 3.1 Pro Preview

File input Text input Image input Audio input Video input Text output
Author's Description

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...

Key Specifications
Cost
$$$$$
Context
1M
Released
Feb 19, 2026
Speed
Ability
Reliability
Supported Parameters

This model supports the following parameters:

Seed Tools Structured Outputs Top P Response Format Reasoning Temperature Stop Include Reasoning Tool Choice Max Tokens
Features

This model supports the following features:

Structured Outputs Response Format Tools Reasoning
Performance Summary

Google's Gemini 3.1 Pro Preview demonstrates a strong performance profile, particularly in reliability, achieving a perfect 100% success rate across all benchmarks, indicating exceptional stability and minimal technical failures. While its speed performance is moderate, ranking in the 21st percentile, its pricing tends to be at premium levels, positioned in the 5th percentile. The model excels in several key areas. It achieves perfect accuracy in Hallucinations, Reasoning, and Ethics benchmarks, showcasing its ability to acknowledge uncertainty appropriately and perform complex logical and ethical evaluations. Its Instruction Following and Coding capabilities are also highly impressive, ranking in the 97th and 95th percentiles respectively, highlighting its enhanced software engineering performance and ability to handle intricate instructions. Mathematics performance is strong at the 91st percentile. General Knowledge and Email Classification show solid, though not top-tier, accuracy at 69% and 51% respectively. The model's description emphasizes its frontier reasoning, improved agentic reliability, and efficient token usage, which are well-supported by its high accuracy in reasoning-intensive tasks and its perfect reliability. Its strengths lie in high-precision reasoning across various modalities and robust autonomous task execution, making it well-suited for advanced development and agentic systems.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $2
Completion $12
Input Cache Read $0.2
Input Cache Write $0.375
Internal Reasoning $12

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Google
Google | google/gemini-3.1-pro-preview-20260219 1M $2 / 1M tokens $12 / 1M tokens
Google AI Studio
Google AI Studio | google/gemini-3.1-pro-preview-20260219 1M $2 / 1M tokens $12 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration
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