This is the Highest Quality model. It offers image fidelity and text rendering and is optimized for premium production needs. This model generates one image at a time.

imagen-4.0-ultra-generate-001

Defines the image dimensions preset used during image generation.

Specifies how many images to generate for a single prompt.

Defines the width-to-height proportion for generated visual output.

best model in terms of price-performance, offering well-rounded capabilities. 2.5 Flash is best for large scale processing, low-latency, high volume tasks that require thinking, and agentic use cases.

gemini-2.5-flash

Controls the creativity of responses. Higher values (e.g., 0.7) increase creativity; lower values (e.g., 0.2) make responses more predictable.

Specifies the maximum number of text units (tokens) allowed in a response, limiting its length.

Focuses on the most likely words based on a percentage of probability.

If true, returns the log probabilities of each output token returned in the content of message.

This parameter tells the model to stop generating text when it reaches any of the specified sequences (like a word or punctuation)

Lists tool definitions or capabilities available to the model.

Decides whether to use tools or just the model for generating responses.

Defines the format or type of the generated response.

Enables parallel execution of tools, allowing multiple tools to run simultaneously.

Sends the response in real-time as it's being generated.

state-of-the-art thinking model, capable of reasoning over complex problems in code, math, and STEM, as well as analyzing large datasets, codebases, and documents using long context.

gemini-2.5-pro

The most cost-efficient and fastest model in the 2.5 family, optimized for extreme low-latency and high-throughput scenarios.

gemini-2.5-flash-lite

Gemini 3.1 Pro is our most advanced reasoning Gemini model, capable of solving complex problems.

gemini-3.1-pro-preview

Controls the level of reasoning used by the model.

Gemini 3 Flash combines Gemini 3 Pro's reasoning capabilities with the Flash line's levels on latency, efficiency, and cost

gemini-3-flash-preview

Gemini 3 Pro Preview is our most powerful agentic and coding model.

gemini-3-pro-preview

Newest and most capable Speed oriented Frontier model from Google.

gemini-3.5-flash

Gemini 3.7 Flash is Google's fast, cost-efficient multimodal model released August 2026, featuring a 1M-token context window, tunable thinking (reasoning) levels, and improved coding and agentic performance over Gemini 3.6 Flash.

gemini-3.7-flash

Controls the level of reasoning (thinking) used by the model.

Gemini 2.5 Flash Image is optimized for image understanding and generation and offers a balance of price and performance. Gemini 2.5 Flash Image uses the speed and cost-effectiveness of Gemini 2.5 Flash to provide fast and efficient image generation and editing capabilities.

gemini-2.5-flash-image

The gemini-3-pro-image-preview model, also known as Nano Banana Pro, is Google's image generation and editing model. It launched in late 2025. Built on the Gemini 3 Pro architecture, it has a Thinking Mode. This mode allows the model to reason through complex instructions. It results in higher accuracy and factuality compared to earlier versions. The model supports resolutions up to 4K. It is the first to integrate Grounding with Google Search.

gemini-3-pro-image-preview

This Standard model balances quality and speed. It supports resolutions up to 2K (2048x2048) and multilingual prompts in 9 languages.

imagen-4.0-generate-001

This is the Low Latency variant. It is designed for high-speed generation.

Model	Context	Max output	Input	Output	Capabilities
gemini-2.5-flash Chat	1.0M	66K	$0.30	$2.50	Files, Tools, System prompt
gemini-2.5-pro Chat	1.0M	66K	$1.25	$10.00	Vision, Tools, System prompt
gemini-2.5-flash-lite Chat	1.0M	66K	$0.10	$0.40	Vision, Tools, System prompt
gemini-3.1-pro-preview Chat	1.0M	66K	$2.00	$12.00	Vision, Tools, System prompt, Reasoning
gemini-3-flash-preview Chat	1.0M	66K	$0.50	$3.00	Vision, Tools, System prompt
gemini-3-pro-preview Chat	1.0M	66K	$2.00	$12.00	Vision, Tools, System prompt
gemini-3.5-flash Chat	1.0M	66K	$15.00	$35.00	Vision, Tools, System prompt
gemini-3.7-flash Chat	1M	66K	$0.75	$3.75	Vision, Files, Tools, System prompt, Reasoning
gemini-2.5-flash-image Image	—	—	—	—	Vision
gemini-3-pro-image-preview Image	—	—	—	—	Vision, Tools
imagen-4.0-generate-001 Image	—	—	—	—	—
imagen-4.0-fast-generate-001 Image	—	—	—	—	—

imagen-4.0-ultra-generate-001

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