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

Nano Banana 2 (Gemini 3.1 Flash Image Preview) at $0.575 in and $3.45 out and GPT Audio Mini at $0.690 in and $2.76 out — per million tokens, from the same wallet.

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Google

0.56¢

for a client proposal

$0.575 in · $3.45 out / 1M

66K context · released 5 months ago

Full page →

GPT Audio Mini

OpenAI

0.57¢

for a client proposal

$0.690 in · $2.76 out / 1M

128K context · released 7 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 1.1¢ for a typical client proposal.

At a glance

Cheapest input: Nano Banana 2 (Gemini 3.1 Flash Image Preview) at $0.575 per million tokens.
Cheapest output: GPT Audio Mini at $2.76 per million tokens.
Largest context: GPT Audio Mini at 128K tokens — about 180 pages.

Cost per task

Estimated totals at the rates above. Solid bar is input, lighter bar is output.

Quick code fix

2K in · 500 out

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

0.29¢

GPT Audio Mini

0.28¢

Draft a client proposal from notes

5K in · 800 out

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

0.56¢

GPT Audio Mini

0.57¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

needs 155K ctx

GPT Audio Mini

needs 155K ctx

Analyze a 50-page legal contract

35K in · 1K out

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

2.4¢

GPT Audio Mini

2.7¢

Large architecture refactor

250K in · 3K out

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

needs 250K ctx

GPT Audio Mini

needs 250K ctx

Solid part of each bar is input tokens, the lighter part is output. Models that don’t fit a task are marked instead of priced.

Cost vs Token Amount

Drag the slider to adjust the split between input and output workload.

80% Input20% Output

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

GPT Audio Mini

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

Pricing

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

GPT Audio Mini

Input / 1M tokens

$0.575

$0.690

Output / 1M tokens

$3.45

$2.76

Web search

1.6¢ / search

—

Specs

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

GPT Audio Mini

Provider

Google

OpenAI

Released

5 months ago

7 months ago

Context window

66K

128K

Max output

66K

16K

Input

Images and Text

Text and Audio

Output

Images and Text

Text and Audio

Reasoning

Shows its thinking

Answers directly

Knowledge cutoff

—

Try it with real numbers

2K tokens in · 500 tokens out.

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Google

0.29¢

for this task

40% input · 60% output

Full pricing →

GPT Audio Mini

OpenAI

0.28¢

for this task

50% input · 50% output

Full pricing →

All 2, same prompt and context: 0.56¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 887 of these.

Which should you pick?

For long documents, GPT Audio Mini has the largest context window here — 128K tokens.

On price, Nano Banana 2 (Gemini 3.1 Flash Image Preview) is the cheapest of the two on a typical task, at about 0.56¢.

For images or files, Nano Banana 2 (Gemini 3.1 Flash Image Preview) can read them directly; GPT Audio Mini is text-only.

If you want to watch the model think, Nano Banana 2 (Gemini 3.1 Flash Image Preview) shows reasoning; the other answers directly.

Or don’t pick. Send the identical prompt to all both, read the answers side by side, and keep the winner. How to run a fair bake-off →

Nano Banana 2 (Gemini 3.1 Flash Image Preview) pricing →GPT Audio Mini pricing →Add Lyria 3 Clip Preview Add Grok 4.20

Questions, answered

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

On a typical client proposal (5K tokens in, 800 out): Nano Banana 2 (Gemini 3.1 Flash Image Preview) at 0.56¢; GPT Audio Mini at 0.57¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

GPT Audio Mini — 128K tokens, about 180 pages.

Can I run Nano Banana 2 (Gemini 3.1 Flash Image Preview) and GPT Audio Mini side by side on Alyph?

Yes — that is what Alyph is built for: the identical prompt with identical context to all 2, answers rendered side by side, billed from one wallet. This exact combination costs about 1.1¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 1.1¢ for a typical client proposal. Free to start, with $5 of credit.