Gemini 3 Pro Preview

Retired Mar 2026

Google's advanced reasoning model and the Pro tier of the Gemini 3 generation.

Context: 1M tokens
Max output: 66K
Cutoff: Jan 2025
Released: Nov 2025

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Capabilities

What Gemini 3 Pro Preview accepts and can do, as published by Google Cloud.

Text Accepts and generates natural-language text.
Image Accepts images as input alongside text.
Video Accepts video as input.
Audio Accepts audio as input.
Reasoning Thinks before it answers, always on or as a switchable mode.
Function calling Connect to external tools, APIs, and systems.
Structured output Return responses in structured formats like JSON.
Web search Search the web for up-to-date information.
Code execution Write and execute code in a sandboxed environment.
File upload Process uploaded documents, spreadsheets, and other files.

Common questions

What is Gemini 3 Pro Preview good for?

Reasoning-heavy multimodal work: it was the Pro tier of the Gemini 3 generation.

When is Gemini 3 Pro Preview not a good fit?

Any new work: Google retired it in March 2026, and Gemini 3.1 Pro Preview refines the same series. Closed weights, so no self-hosting.

How does Gemini 3 Pro Preview compare with Gemini 3.1 Pro Preview?

Google says Gemini 3.1 Pro Preview refines Gemini 3 Pro Preview with better thinking, less token use and more grounded, factually consistent output, tuned for software engineering and agent work that needs precise tool use. Same 1M-token context and text, image, audio and video input. Gemini 3 Pro Preview came out 3 months earlier.

Can I self-host Gemini 3 Pro Preview?

No. Google Cloud does not publish the weights; Gemini 3 Pro Preview is available only through hosted APIs.