Gemini 3 Pro Preview API

Gemini 3 Pro API Overview

Gemini 3, developed by Google, is an advanced multimodal AI model known for reasoning, deep problem-solving capabilities, and a massive context window. It excels across a wide range of tasks including coding, complex reasoning, multimodal understanding, and long-form content processing. Its "Deep Think" mode represent the pinnacle of the Gemini series, pushing AI performance boundaries in 2025.

Technical Specifications

• Model Type: Multimodal large language model
• Modalities Supported: Text, image, audio, video, code generation
• Context Window: Over 1 million tokens for extended memory and large document understanding
• Architecture: Advanced transformer backbone with enhanced reasoning and multimodal layers
• Code Execution: Supported in Deep Think mode for advanced problem-solving

Performance Benchmarks

Across reasoning, multimodal tasks, and coding benchmarks, Gemini not only exceeds the capabilities of Gemini 2.5 Pro but also ranks above GPT-5.1 and Claude Sonnet 4.5 in the majority of evaluated categories.

Key Features

• Advanced Multimodal Reasoning: Handles text, images, short videos, audio, and SVG content seamlessly
• Deep Think Mode: Enhanced step-by-step reasoning, better long-horizon planning, and novel challenge solving
• Extended Context Window: Processes entire codebases, long documents, or research papers in one go
• Superior Coding Capabilities: Automated code generation, debugging, and optimization across multiple languages

Gemini 3 API Pricing

≤ 200K tokens

• Input: $2.6 / 1M tokens
• Output: $15.6 / 1M tokens

> 200K tokens

• Input: $5.2 / 1M tokens
• Output: $23.4 / 1M tokens

Use Cases

• Scientific research analysis and large document summarization
• Legal and financial document review with deep contextual understanding
• Software development: code generation, debugging, architecture planning
• Interactive AI assistants managing multi-step workflows (e.g., scheduling, email management)
• Visual content analysis including image recognition and video content understanding
• Multilingual and cross-cultural AI applications for global teams

Code Sample

Comparison with Other Models

vs GPT-5.1: Gemini 3 Pro offers native multimodal capabilities with superior real-time tool orchestration, including SVG and video generation, while GPT-5.1 remains primarily text-based with limited multimodal support. In benchmarks, Gemini 3 outperforms GPT-5.1 by a significant margin in reasoning exams and coding accuracy.

vs Claude 4.5 Sonnet: Gemini 3 excels with higher accuracy in complex reasoning and coding tasks compared to Claude 4.5 Sonnet, which shows moderate performance and less detailed explanations. Additionally, Gemini 3  handles larger context windows more effectively, enabling better long-document understanding.

vs Claude Opus 4.1: While Claude Opus 4.1 provides the deepest reasoning suited for mission-critical enterprises with premium pricing, Gemini 3 delivers a balanced combination of multimodal processing, large context windows, and high reasoning capabilities.

• Scientific research analysis and large document summarization
• Legal and financial document review with deep contextual understanding
• Software development: code generation, debugging, architecture planning
• Interactive AI assistants managing multi-step workflows (e.g., scheduling, email management)
• Visual content analysis including image recognition and video content understanding
• Multilingual and cross-cultural AI applications for global teams

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