Nano Banana (Gemini 2.5 Flash Image) vs GPT-6 Astra Pro

Price, context window & benchmark comparison

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Nano Banana (Gemini 2.5 Flash Image)

Google
$0.30 / $2.50
Input / Output · per 1M tokens
VS
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GPT-6 Astra Pro

OpenAI
$10.00 / $50.00
Input / Output · per 1M tokens
Compare different models
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Verdict: Nano Banana (Gemini 2.5 Flash Image) is 23.5× cheaper than GPT-6 Astra Pro on a typical 3:1 input/output mix. GPT-6 Astra Pro has the larger context window (1.1M vs 33K).
Nano Banana (Gemini 2.5 Flash Image)GPT-6 Astra Pro
Input price / 1M$0.30$10.00
Output price / 1M$2.50$50.00
Blended price (3:1)$0.85$20.00
Cached input / 1M$0.03$1.00
Context window33K1.1M
Max output8K128K
Intelligence index——
Coding index——
Providers—5
Best provider uptime (30m)—100.0%
Vision inputYesYes
ReasoningNoYes
Tool callingNoYes
Released2025-10-072026-09-04
Retirement2027-03-15—

Cost calculator

FAQ

Which is cheaper, Nano Banana (Gemini 2.5 Flash Image) or GPT-6 Astra Pro?

Nano Banana (Gemini 2.5 Flash Image) is 23.5× cheaper than GPT-6 Astra Pro on a typical 3:1 input/output mix.

Nano Banana (Gemini 2.5 Flash Image) vs GPT-6 Astra Pro: which has a bigger context window?

Nano Banana (Gemini 2.5 Flash Image): 32,768 tokens. GPT-6 Astra Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Nano Banana (Gemini 2.5 Flash Image) ≈ $1,850, GPT-6 Astra Pro ≈ $45,000.

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