Nano Banana Pro (Gemini 3 Pro Image) vs GPT-5.2 Chat

Nano Banana Pro (Gemini 3 Pro Image) and GPT-5.2 Chat cost about the same per output token ($12.00 vs $14.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.

Replace Nano Banana Pro (Gemini 3 Pro Image) Replace GPT-5.2 Chat

Nano Banana Pro (Gemini 3 Pro Image)Google

Coding: No data
Overall: No data
Output $/M: $12.00

GPT-5.2 ChatOpenAI

Coding: No data
Overall: No data
Output $/M: $14.00

vs $12.00 vs $14.00 per 1M output tokens. Nano Banana Pro (Gemini 3 Pro Image) is 1.2x cheaper.

Nano Banana Pro (Gemini 3 Pro Image) or GPT-5.2 Chat: which to pick

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

Pick Nano Banana Pro (Gemini 3 Pro Image) for output tokens 1.2x cheaper ($12.00 vs $14.00 per million) and a larger context window (131K against 128K tokens).

Model ANano Banana Pro (Gemini 3 Pro Image)GoogleNot benchmarkedNo coding benchmarkNo cost per solved task Model BGPT-5.2 ChatOpenAINot benchmarkedNo coding benchmarkNo cost per solved task

No benchmark has tested both yet. Nano Banana Pro (Gemini 3 Pro Image) has results on LMArena Image Edit; GPT-5.2 Chat 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 Pro (Gemini 3 Pro Image)
Nano Banana Pro (Gemini 3 Pro Image) takes 131K tokens against 128K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Nano Banana Pro (Gemini 3 Pro Image)
Nano Banana Pro (Gemini 3 Pro Image) $0.0080, GPT-5.2 Chat $0.0088 per turn.
List prices

At a glance

Coding index: Nano Banana Pro (Gemini 3 Pro Image) not benchmarked, GPT-5.2 Chat 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 Pro (Gemini 3 Pro Image) $12.00 against GPT-5.2 Chat $14.00 per million output tokens, 1.2x apart.
Context window: Nano Banana Pro (Gemini 3 Pro Image) takes 131K tokens, GPT-5.2 Chat 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 Pro (Gemini 3 Pro Image) and GPT-5.2 Chat
Benchmark	Nano Banana Pro (Gemini 3 Pro Image)	GPT-5.2 Chat	Leader
LMArena Image Edit	1390	Not measured	Only Nano Banana Pro (Gemini 3 Pro 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 Pro (Gemini 3 Pro Image)$0.0080Fits in one request

GPT-5.2 Chat$0.0088Fits in one request

Nano Banana Pro (Gemini 3 Pro Image) costs less

Repository review

50K input + 3K output tokens

Nano Banana Pro (Gemini 3 Pro Image)$0.136Fits in one request

GPT-5.2 Chat$0.130Fits in one request

GPT-5.2 Chat costs less

Agent loop

200K input + 10K output tokens

Nano Banana Pro (Gemini 3 Pro Image)$0.520Exceeds the context window

GPT-5.2 Chat$0.490Exceeds the context window

GPT-5.2 Chat 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 Pro (Gemini 3 Pro Image) and GPT-5.2 Chat
Specification	Google Nano Banana Pro (Gemini 3 Pro Image)	OpenAI GPT-5.2 Chat
Maker	Google	OpenAI
Weights	No public weights listed	No public weights listed
Released	June 18, 2026	December 10, 2025
Context window	131K	128K
Input $/Mtok	$2.00	$1.75
Output $/Mtok	$12.00	$14.00
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 Pro (Gemini 3 Pro Image) better than GPT-5.2 Chat for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Nano Banana Pro (Gemini 3 Pro Image) for output tokens 1.2x cheaper ($12.00 vs $14.00 per million) and a larger context window (131K against 128K tokens).

Which is cheaper, Nano Banana Pro (Gemini 3 Pro Image) or GPT-5.2 Chat?

Nano Banana Pro (Gemini 3 Pro Image) costs $2.00 per million input tokens and $12.00 per million output tokens; GPT-5.2 Chat costs $1.75 and $14.00. Cost per solved task is known for neither of them.

Which has the bigger context window, Nano Banana Pro (Gemini 3 Pro Image) or GPT-5.2 Chat?

Nano Banana Pro (Gemini 3 Pro Image), with 131K tokens against 128K.

Has any benchmark tested both Nano Banana Pro (Gemini 3 Pro Image) and GPT-5.2 Chat?

No benchmark has tested both yet. Nano Banana Pro (Gemini 3 Pro Image) has results on LMArena Image Edit; GPT-5.2 Chat has none yet. Compare them on price and context instead. Data as of October 21, 2026.