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Nano Banana Pro (Gemini 3 Pro Image) vs GPT Image 2.6 Flare: API price, context & features · api14

Google: Nano Banana Pro (Gemini 3 Pro Image) vs OpenAI: GPT Image 2.6 Flare

A side-by-side comparison of Google: Nano Banana Pro (Gemini 3 Pro Image) ($7.00 / 1M tokens) and OpenAI: GPT Image 2.6 Flare ($28.00 / 1M tokens) using current USD prices and capabilities from the api14 catalog. Both run through the same OpenAI-compatible API.

Specifications

	Google: Nano Banana Pro (Gemini 3 Pro Image)	OpenAI: GPT Image 2.6 Flare
Provider	Google	OpenAI
Input	$7.00 / 1M tokens	$28.00 / 1M tokens
Output	$42.00 / 1M tokens	$28.00 / 1M tokens
Cache read	$0.70 / 1M tokens	$7.00 / 1M tokens
Cache write	$1.31 / 1M tokens	$35.00 / 1M tokens
Reasoning	$42.00 / 1M tokens	-
Image output	$420.00 / 1M tokens	$105.00 / 1M tokens
Audio input	$7.00 / 1M tokens	-
Image	$0.000007 / image	-
Web search	$49.00 / 1K searches	$35.00 / 1K searches
Context window	131,072	400,000
Max output	32,768	360,000
Input	image, text	text, image
Output	image, text	image
Tool calling
Structured output
Reasoning control
Added	Jun 18, 2026	Nov 4, 2026

Key differences

Google: Nano Banana Pro (Gemini 3 Pro Image) is 75% cheaper on input tokens.
OpenAI: GPT Image 2.6 Flare is 33% cheaper on output tokens.
OpenAI: GPT Image 2.6 Flare reads 3.1× more context (400,000 tokens).
Only Google: Nano Banana Pro (Gemini 3 Pro Image) supports tool calling.
Only Google: Nano Banana Pro (Gemini 3 Pro Image) supports reasoning effort control.

Switch with one string

Both models use the same endpoint and request shape. Change the model value from "google/gemini-3-pro-image" to "openai/gpt-image-2.6-flare" and prompts, streaming and tools keep working.

Google: Nano Banana Pro (Gemini 3 Pro Image) details & playground →OpenAI: GPT Image 2.6 Flare details & playground →

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api14.com/api/v1",
  apiKey: process.env.API14_API_KEY,
});

const result = await client.images.generate({
  "model": "openai/gpt-image-2.6-flare",
  "prompt": "A minimalist product photo of a ceramic mug on a wooden table",
  "n": 1,
  "aspect_ratio": "1:1"
});
import { writeFile } from "node:fs/promises";
await writeFile("image.png", Buffer.from(result.data[0].b64_json, "base64"));

Google: Nano Banana Pro (Gemini 3 Pro Image) vs OpenAI: GPT Image 2.6 Flare

Specifications

Key differences

Switch with one string

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