Model comparison · Updated 17 Aug 2026

Nano Banana Pro (Gemini 3 Pro Image) vs o3

Nano Banana Pro (Gemini 3 Pro Image) and o3 cost the same on input, $2.00 per 1M tokens. o3 has the larger context window (200K against 131K tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $1,980 a month for Nano Banana Pro (Gemini 3 Pro Image) and $1,620 for o3.

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ModelsAtlas. “Nano Banana Pro (Gemini 3 Pro Image) vs o3”. Retrieved 17 Aug 2026. https://modelsatlas.com/compare/google/gemini-3-pro-image/vs/openai/o3

Model A

Nano Banana Pro (Gemini 3 Pro Image)

by Google · weights not marked open · GRIDE3

Input / 1M
$2.00
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026

Output / 1M$12.00

Context131K

Model B

by OpenAI · weights not marked open · GRIDE3

Input / 1M
$2.00
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026

Output / 1M$8.00

Context200K

Key numbers

Standard tier · highlighted = better

Nano Banana Pro (Gemini 3 Pro Image)

Input / 1M tokens

$2.00

Output / 1M tokens

$12.00

$8.00

Batch input / output

Not listed

$0.55 / $2.20

Context window

131,072

200,000

Input types

Not disclosed

Weights

Not marked open

Tiers listed

standard

batch, standard

Prices checked

2026-08-17

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out

$1,980/mo

$1,620/mo

RAG over documents2k queries/day · 12k in, 500 out

$1,800/mo

$1,680/mo

Coding agent300 tasks/day · 60k in, 8k out

$1,944/mo

$1,656/mo

Nano Banana Pro (Gemini 3 Pro Image) o3 · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

Same square. Nano Banana Pro (Gemini 3 Pro Image) and o3 share E3.

Same square as Nano Banana Pro (Gemini 3 Pro Image): Claude Haiku 4.5 ($1.00), Grok Build 0.1 ($1.00), o3 Mini High ($1.10). Open E3

Nano Banana Pro (Gemini 3 Pro Image)o3Nearest neighboursOpen weights

View the map as a table (1 squares)

Square	Price band	Context band	Models
GRIDE3	$1–3	128–256K	Nano Banana Pro (Gemini 3 Pro Image), o3, Command A, o3 Mini High, o4 Mini, o4 Mini High, Claude Haiku 4.5

Capabilities side by side

Only what our records list

Nano Banana Pro (Gemini 3 Pro Image)

Vision input

Not disclosed

Audio input

Not disclosed

Open weights

Not marked open

Batch tier

Not listed

Supported

Free tier

Not listed

Thinking tier

Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose Nano Banana Pro (Gemini 3 Pro Image) if…

Nothing in the recorded numbers favours Nano Banana Pro (Gemini 3 Pro Image) over o3. Pick it for what our records do not cover — your own tests, or an account you already have with Google.

Choose o3 if…

output dominates your bill: $8.00 per 1M output against $12.00
your prompts are long: it takes 200,000 tokens against 131,072
work can wait: it lists a batch tier and the other does not

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is Nano Banana Pro (Gemini 3 Pro Image) better than o3?

We do not benchmark quality, so we cannot say. On the recorded numbers: Nano Banana Pro (Gemini 3 Pro Image) and o3 cost the same on input, $2.00 per 1M tokens. o3 has the larger context window (200K against 131K tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $1,980 a month for Nano Banana Pro (Gemini 3 Pro Image) and $1,620 for o3. Which is better for you depends on your task; test both on your own prompts.

Which is cheaper, Nano Banana Pro (Gemini 3 Pro Image) or o3?

They cost the same on input, $2.00 per 1M tokens. Output is $12.00 for Nano Banana Pro (Gemini 3 Pro Image) and $8.00 for o3.

How much does each cost per 1M tokens?

Nano Banana Pro (Gemini 3 Pro Image): $2.00 input and $12.00 output. o3: $2.00 input and $8.00 output. Standard tier, USD.

Which has the larger context window?

o3, with 200,000 tokens. Nano Banana Pro (Gemini 3 Pro Image) has 131,072 tokens.

Do both offer batch pricing?

Nano Banana Pro (Gemini 3 Pro Image) lists no batch tier. o3 lists a batch tier, at 50% of its standard price.

Can both read images or audio?

Input types recorded for Nano Banana Pro (Gemini 3 Pro Image): none recorded. For o3: none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.

Is either model open-weight?

Nano Banana Pro (Gemini 3 Pro Image): not marked open-weight in our records. o3: not marked open-weight in our records.

What would each cost for a support chatbot?

At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $1,980 a month for Nano Banana Pro (Gemini 3 Pro Image) and $1,620 for o3. This is our calculation from the listed prices, not a quote.

About the two models

Nano Banana Pro (Gemini 3 Pro Image)

By Google. $2.00 input and $12.00 output per 1M tokens, 131K context, atlas square E3. Tiers listed: standard.

Full specs & pricing →

o3

By OpenAI. $2.00 input and $8.00 output per 1M tokens, 200K context, atlas square E3. Tiers listed: batch, standard.

Full specs & pricing →

Compare Nano Banana Pro (Gemini 3 Pro Image) with…

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Is Nano Banana Pro (Gemini 3 Pro Image) better than o3?
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Which is cheaper, Nano Banana Pro (Gemini 3 Pro Image) or o3?
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How much does each cost per 1M tokens?
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