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

GPT Audio Mini costs 1.3x less per output token than Nano Banana 2 (Gemini 3.1 Flash Image) ($2.40 vs $3.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.

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

Nano Banana 2 (Gemini 3.1 Flash Image)Google

Coding: No data
Overall: No data
Output $/M: $3.00

GPT Audio MiniOpenAI

Coding: No data
Overall: No data
Output $/M: $2.40

vs $3.00 vs $2.40 per 1M output tokens. GPT Audio Mini is 1.3x cheaper.

Nano Banana 2 (Gemini 3.1 Flash Image) or GPT Audio Mini: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick Nano Banana 2 (Gemini 3.1 Flash Image) for a larger context window (131K against 128K tokens).

Model ANano Banana 2 (Gemini 3.1 Flash Image)GoogleNot benchmarkedNo coding benchmarkNo cost per solved task Model BGPT Audio MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task

No benchmark has tested both yet. Nano Banana 2 (Gemini 3.1 Flash Image) has results on LMArena Image Edit; GPT Audio Mini has none yet. Compare them on price and context instead.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Long documents
Listed context window
Nano Banana 2 (Gemini 3.1 Flash Image)
Nano Banana 2 (Gemini 3.1 Flash Image) takes 131K tokens against 128K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GPT Audio Mini
Nano Banana 2 (Gemini 3.1 Flash Image) $0.0020, GPT Audio Mini $0.0018 per turn.
List prices

At a glance

Coding index: Nano Banana 2 (Gemini 3.1 Flash Image) not benchmarked, GPT Audio Mini not benchmarked.
Widest category: None yet: no category has been tested on both models.
Widest single gap: None yet: no benchmark has tested both models.
Output price: Nano Banana 2 (Gemini 3.1 Flash Image) $3.00 against GPT Audio Mini $2.40 per million output tokens, 1.3x apart.
Context window: Nano Banana 2 (Gemini 3.1 Flash Image) takes 131K tokens, GPT Audio Mini 128K.

Benchmark by benchmark

Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.

Image generationDirectional onlyPublic boards, shown as published, kept out of the index1 board measured

Image generation benchmarks for Nano Banana 2 (Gemini 3.1 Flash Image) and GPT Audio Mini
Benchmark	Nano Banana 2 (Gemini 3.1 Flash Image)	GPT Audio Mini	Leader
LMArena Image Edit	1387	Not measured	Only Nano Banana 2 (Gemini 3.1 Flash Image) measured
Neither model has a result on the other 4 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Nano Banana 2 (Gemini 3.1 Flash Image)$0.0020Fits in one request

GPT Audio Mini$0.0018Fits in one request

GPT Audio Mini costs less

Repository review

50K input + 3K output tokens

Nano Banana 2 (Gemini 3.1 Flash Image)$0.034Fits in one request

GPT Audio Mini$0.037Fits in one request

Nano Banana 2 (Gemini 3.1 Flash Image) costs less

Agent loop

200K input + 10K output tokens

Nano Banana 2 (Gemini 3.1 Flash Image)$0.130Exceeds the context window

GPT Audio Mini$0.144Exceeds the context window

Nano Banana 2 (Gemini 3.1 Flash Image) costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Nano Banana 2 (Gemini 3.1 Flash Image) and GPT Audio Mini
Specification	Google Nano Banana 2 (Gemini 3.1 Flash Image)	OpenAI GPT Audio Mini
Maker	Google	OpenAI
Weights	No public weights listed	No public weights listed
Released	June 18, 2026	January 19, 2026
Context window	131K	128K
Input $/Mtok	$0.50	$0.60
Output $/Mtok	$3.00	$2.40
Coding index	Not benchmarked	Not benchmarked
Independent measurements behind it	0	0
Cost per solved task	Not computable	Not computable
Source	OpenRouter listing	OpenRouter listing

Questions

Is Nano Banana 2 (Gemini 3.1 Flash Image) better than GPT Audio Mini for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Nano Banana 2 (Gemini 3.1 Flash Image) for a larger context window (131K against 128K tokens).

Which is cheaper, Nano Banana 2 (Gemini 3.1 Flash Image) or GPT Audio Mini?

Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.50 per million input tokens and $3.00 per million output tokens; GPT Audio Mini costs $0.60 and $2.40. Cost per solved task is known for neither of them.

Which has the bigger context window, Nano Banana 2 (Gemini 3.1 Flash Image) or GPT Audio Mini?

Nano Banana 2 (Gemini 3.1 Flash Image), with 131K tokens against 128K.

Has any benchmark tested both Nano Banana 2 (Gemini 3.1 Flash Image) and GPT Audio Mini?

No benchmark has tested both yet. Nano Banana 2 (Gemini 3.1 Flash Image) has results on LMArena Image Edit; GPT Audio Mini has none yet. Compare them on price and context instead. Data as of October 21, 2026.