gemini-3-pro-image-preview-free vs gpt-image-2.5-sunburst

Compare gemini-3-pro-image-preview-free from google and gpt-image-2.5-sunburst from openai side by side — benchmarks, pricing, context window, features, and provider availability.

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gemini-3-pro-image-preview-free

gpt-image-2.5-sunburst

gemini-3-pro-image-preview-free

By : google

注意： This model is free to use in Studio Chat and via the API, but it comes with rate limits and may be temporarily unavailable. For stable, high-availability use, please choose a standard-priced model.

Nano Banana Pro is an AI image generation model that is a significant upgrade from its predecessor, built on Google's Gemini 3 Pro. It promises to move beyond simple pattern matching to a more reasoning-driven system with improved physics understanding, text rendering, and image consistency. Key features include faster processing, native 2K resolution, and the ability to edit existing images with greater control, aiming to produce more reliable and professional-grade results.

gpt-image-2.5-sunburst

By : openai

GPT Image 2.5 Sunburst is an image generation and editing model from OpenAI, positioned as the precision-oriented tier of the GPT Image 2.5 series. It is suited to detailed creative work where editing accuracy matters more than generation speed, via the dedicated Images API.

Model Overview

Feature

gemini-3-pro-image-preview-free

gpt-image-2.5-sunburst

Input Context Window

The number of tokens supported by the input context window.

65.5K

tokens

10K

tokens

Maximum Output Tokens

The number of tokens that can be generated by the model in a single request.

Release Date

When the model was first released.

November 20, 2025

11 months ago

September 9, 2026

1 month ago

Input Type

The types of inputs the model can process.

Output Type

The types of outputs the model can process.

gemini-3-pro-image-preview-free offers a larger context window (65,536 tokens vs 10,000 tokens). gpt-image-2.5-sunburst supports reasoning capabilities, while gemini-3-pro-image-preview-free does not.

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How to use gemini-3-pro-image-preview-free or gpt-image-2.5-sunburst

Simply change the model name to gemini-3-pro-image-preview-free or gpt-image-2.5-sunburst to adjust the model. 开桥 normalizes requests and responses across providers for you.

Gemini: Python-SDK

Imagen: Python-SDK

from google import genai
from google.genai import types

client = genai.Client(
    api_key="$OPENQIAO_API_KEY",
    vertexai=True,
    http_options=types.HttpOptions(api_version='v1', base_url='https://openqiao.com/api/vertex-ai')
)