Beginner

Gemini Models & Capabilities

Understand the Gemini model family. Compare Ultra, Pro, Flash, and Nano across performance, context windows, pricing, and ideal use cases.

Model Comparison Overview

Each Gemini model is optimized for different scenarios. Here is a comprehensive comparison:

Feature	Ultra	Pro	Flash	Nano
Capability	Highest	High	Good	Basic
Speed	Slower	Moderate	Fast	Fastest
Context Window	Up to 1M tokens	Up to 2M tokens	Up to 1M tokens	32K tokens
Multimodal	Full (text, image, video, audio, code)	Full	Full	Text, limited image
Deployment	Cloud	Cloud	Cloud	On-device
Cost	Highest	Moderate	Low	Free (on-device)

Gemini Ultra

The most powerful model in the Gemini family, designed for highly complex tasks that require advanced reasoning and understanding.

When to Use Ultra

• Complex mathematical proofs and scientific reasoning
• Advanced coding tasks requiring deep architectural understanding
• Multi-step analysis across large documents or datasets
• Tasks requiring the highest quality output regardless of cost
• Research-grade multimodal analysis

Gemini Pro

The balanced model offering excellent performance across a wide range of tasks. Pro is the default recommendation for most applications.

Key Strengths

• Massive context window: Up to 2 million tokens — the largest in the industry. Process entire codebases, books, or video libraries in a single prompt.
• Strong reasoning: Excellent at analysis, coding, math, and creative tasks
• Full multimodal: Handles text, images, video, and audio natively
• Cost-effective: Significantly cheaper than Ultra for comparable quality on most tasks

When to Use Pro

• General-purpose content generation and analysis
• Code generation, review, and debugging
• Document summarization and Q&A
• Multimodal tasks combining text with images or video
• Applications requiring very large context windows

Gemini Flash

Optimized for speed and efficiency. Flash delivers strong performance at a fraction of the cost and latency of Pro.

Key Strengths

• Speed: Significantly faster response times than Pro
• Cost: Much lower per-token pricing, ideal for high-volume use
• Large context: Still supports up to 1 million tokens
• Quality: Surprisingly capable for its speed class

When to Use Flash

• Real-time applications where latency matters
• High-volume processing (batch summarization, classification)
• Chat applications requiring fast responses
• Cost-sensitive applications that need good quality
• Prototyping and development before upgrading to Pro

Gemini Nano

The smallest model, designed to run directly on mobile devices and edge hardware without cloud connectivity.

Key Features

• On-device: Runs locally on Pixel phones, Samsung Galaxy devices, and other compatible hardware
• Privacy: Data never leaves the device, ideal for sensitive information
• Offline: Works without internet connectivity
• Instant: No network latency, immediate responses

Where Nano is Used

• Smart Reply suggestions in messaging apps
• On-device text summarization
• Keyboard suggestions and autocomplete
• Quick translation without internet
• Chrome's built-in AI features

Pricing Overview

Gemini API pricing is based on the number of input and output tokens processed:

Model	Input (per 1M tokens)	Output (per 1M tokens)	Free Tier
Gemini Pro	$1.25 - $2.50	$5.00 - $10.00	15 RPM, 1M TPM
Gemini Flash	$0.075 - $0.15	$0.30 - $0.60	15 RPM, 1M TPM
Gemini Ultra	Contact Google	Contact Google	Limited via Gemini Advanced
Gemini Nano	Free (on-device)	Free (on-device)	N/A

Choosing the Right Model

Use this decision guide to pick the best model for your use case: