API cost decision in 10 seconds

Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs GPT Audio Mini

Pick GPT Audio Mini for lower cost; pick Nano Banana 2 (Gemini 3.1 Flash Image Preview) only if the larger context window matters more.

Pricing data updated: 2026-05-26T11:08:00Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick GPT Audio Mini for lower cost; pick Nano Banana 2 (Gemini 3.1 Flash Image Preview) only if the larger context window matters more.

On the standard 1M input plus 500K output workload, GPT Audio Mini is estimated at $1.8 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.2 (10% lower).

Cost-first pickGPT Audio Mini

Context-first pickNano Banana 2 (Gemini 3.1 Flash Image Preview)

Sample savings$0.210%

10x traffic gap$2

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has more context, but GPT Audio Mini saves $0.2 on the standard workload. At 10x that traffic, the same price gap is about $2. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Cost winner changes by workload shape: input-heavy / RAG favors Nano Banana 2 (Gemini 3.1 Flash Image Preview), balanced workload favors GPT Audio Mini, and output-heavy chatbot favors GPT Audio Mini.

Workload shape	Token mix	Better pick	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	GPT Audio Mini
Input-heavy / RAG	5M input + 500K output	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	$4	$4.2
Balanced workload	1M input + 1M output	GPT Audio Mini	$3.5	$3
Output-heavy chatbot	1M input + 5M output	GPT Audio Mini	$15.5	$12.6

Cheaper input Nano Banana 2 (Gemini 3.1 Flash Image Preview) $0.5 vs $0.6 / 1M

Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.1 cheaper per 1M input tokens (16.7% lower; 1.2x difference).

Cheaper output GPT Audio Mini $3 vs $2.4 / 1M

GPT Audio Mini is $0.6 cheaper per 1M output tokens (20% lower; 1.25x difference).

Larger context Nano Banana 2 (Gemini 3.1 Flash Image Preview) 131.07K vs 128K

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has 3.07K more context (1.02x larger).

Sample workload GPT Audio Mini $2 vs $1.8

GPT Audio Mini is $0.2 cheaper on the standard workload (10% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Nano Banana 2 (Gemini 3.1 Flash Image Preview) Calculating… Estimated API cost

GPT Audio Mini Calculating… Estimated API cost

Cheaper for this workload Calculating… Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has the lower input price; GPT Audio Mini has the lower output price; Nano Banana 2 (Gemini 3.1 Flash Image Preview) offers the larger context window. For the 1M input plus 500K output sample, GPT Audio Mini is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview) and $1.8 for GPT Audio Mini.

Best Fit

Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) when you care most about lower input-token price, and larger context window.

Choose GPT Audio Mini when you care most about lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, GPT Audio Mini is estimated at $1.8 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.2 (10% lower).
GPT Audio Mini is $0.2 cheaper on the standard workload (10% lower).
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.1 cheaper per 1M input tokens (16.7% lower; 1.2x difference).
GPT Audio Mini is $0.6 cheaper per 1M output tokens (20% lower; 1.25x difference).
Nano Banana 2 (Gemini 3.1 Flash Image Preview) has 3.07K more context (1.02x larger).

Head-to-Head Specs

Feature	Nano Banana 2 (Gemini 3.1 Flash Image Preview) (Google)	GPT Audio Mini (OpenAI)
Input Price prompt tokens per 1M	$0.5	$0.6
Completion Price per 1M tokens	$3	$2.4
Sample Workload Cost 1M input + 500K output	$2	$1.8
Context Window	131.07K	128K
Release Date	2026-02-26	2026-01-19

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	GPT Audio Mini	On the standard 1M input plus 500K output workload, GPT Audio Mini is estimated at $1.8 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.2 (10% lower).
High-volume input processing	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	GPT Audio Mini	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Gemma 4 26B A4B (free) can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
Gemma 4 31B (free) can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
Lyria 3 Pro Preview can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
Lyria 3 Clip Preview can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
Gemini 3.1 Flash Lite offers 1.05M context with $1 sample workload cost.

Popular competitors

No popular competitor is currently available.

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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Google catalog

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OpenAI catalog

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Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines...

GPT Audio Mini

A cost-efficient version of GPT Audio. The new snapshot features an upgraded decoder for more natural sounding voices and maintains better voice consistency. Input is priced at $0.60 per million...