Gemini 3.1 Pro Preview vs Nano Banana 2.1

Price, context window & benchmark comparison

Gemini 3.1 Pro Preview

Google

$2.00 / $12.00

Input / Output · per 1M tokens

Nano Banana 2.1

Google

$1.50 / $7.50

Input / Output · per 1M tokens

Compare different models

Verdict: Nano Banana 2.1 is 33% cheaper than Gemini 3.1 Pro Preview on a typical 3:1 input/output mix. Gemini 3.1 Pro Preview has the larger context window (1M vs 66K).

	Gemini 3.1 Pro Preview	Nano Banana 2.1
Input price / 1M	$2.00	$1.50
Output price / 1M	$12.00	$7.50
Blended price (3:1)	$4.50	$3.00
Cached input / 1M	$0.20	—
Context window	1M	66K
Max output	66K	59K
Intelligence index	—	—
Coding index	68.8	—
Providers	—	1
Best provider uptime (30m)	—	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-02-19	2026-10-06
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Gemini 3.1 Pro Preview or Nano Banana 2.1?

Nano Banana 2.1 is 33% cheaper than Gemini 3.1 Pro Preview on a typical 3:1 input/output mix.

Gemini 3.1 Pro Preview vs Nano Banana 2.1: which has a bigger context window?

Gemini 3.1 Pro Preview: 1,048,576 tokens. Nano Banana 2.1: 65,536 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.1 Pro Preview ≈ $10,000, Nano Banana 2.1 ≈ $6,750.

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