Nano Banana Pro (Gemini 3 Pro Image Preview) vs GPT-6 Astra

Price, context window & benchmark comparison

Nano Banana Pro (Gemini 3 Pro Image Preview)

Google

$2.00 / $12.00

Input / Output · per 1M tokens

GPT-6 Astra

OpenAI

$10.00 / $50.00

Input / Output · per 1M tokens

Compare different models

Verdict: Nano Banana Pro (Gemini 3 Pro Image Preview) is 4.4× cheaper than GPT-6 Astra on a typical 3:1 input/output mix. GPT-6 Astra has the larger context window (1.1M vs 66K).

	Nano Banana Pro (Gemini 3 Pro Image Preview)	GPT-6 Astra
Input price / 1M	$2.00	$10.00
Output price / 1M	$12.00	$50.00
Blended price (3:1)	$4.50	$20.00
Cached input / 1M	$0.20	$1.00
Context window	66K	1.1M
Max output	33K	128K
Intelligence index	—	52.7
Coding index	—	76.9
Providers	—	6
Best provider uptime (30m)	—	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	No	Yes
Released	2025-11-20	2026-09-04
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Nano Banana Pro (Gemini 3 Pro Image Preview) or GPT-6 Astra?

Nano Banana Pro (Gemini 3 Pro Image Preview) is 4.4× cheaper than GPT-6 Astra on a typical 3:1 input/output mix.

Nano Banana Pro (Gemini 3 Pro Image Preview) vs GPT-6 Astra: which has a bigger context window?

Nano Banana Pro (Gemini 3 Pro Image Preview): 65,536 tokens. GPT-6 Astra: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Nano Banana Pro (Gemini 3 Pro Image Preview) ≈ $10,000, GPT-6 Astra ≈ $45,000.

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