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Nano Banana 2.1 vs GPT-5 Image Mini

GPT-5 Image Mini costs 3.8x less per output token than Nano Banana 2.1 ($2.00 vs $7.50 per million). Updated October 22, 2026; 3 benchmarks have a result for both.

Replace Nano Banana 2.1 Replace GPT-5 Image Mini
Nano Banana 2.1Google
Coding
No data
Overall
No data
Output $/M
$7.50
3
GPT-5 Image MiniOpenAI
Coding
No data
Overall
No data
Output $/M
$2.00
0
vs boards won of 3 shared

Nano Banana 2.1 or GPT-5 Image Mini: which to pick

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

Compare them on price, context and the boards below.

Model ANano Banana 2.1GoogleNot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-5 Image MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
3
Nano Banana 2.1 only
2
GPT-5 Image Mini only
0
Like-for-like categories
1 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

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.

At a glance

Coding index
Nano Banana 2.1 not benchmarked, GPT-5 Image Mini not benchmarked.
Widest category
Image generation, 14.3 points apart on average over 3 shared benchmarks.
Widest single gap
Design Arena: graphic design: Nano Banana 2.1 1333 against GPT-5 Image Mini 1165, 21.0 points apart on a 0 to 100 scale.
Output price
Nano Banana 2.1 $7.50 against GPT-5 Image Mini $2.00 per million output tokens, 3.8x apart.
Context window
Nano Banana 2.1 takes 66K tokens, GPT-5 Image Mini 400K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryNano Banana 2.1BarsGPT-5 Image MiniTies
Image generation30
All shared boards30
CodingNot comparableSix of these boards feed the Vibe Coding Index0 boards, none shared
Coding benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 43 boards here
IntelligenceNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Intelligence benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 2 boards here
Agentic workNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Agentic work benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 42 boards here
ReasoningNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Reasoning benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 23 boards here
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Math benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 14 boards here
KnowledgeNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Knowledge benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 20 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 9 boards here
GeneralNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
General benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Neither model has a result on 48 boards here
Image generationLike-for-likePublic boards, shown as published, kept out of the index30
Image generation benchmarks for Nano Banana 2.1 and GPT-5 Image Mini
BenchmarkNano Banana 2.1GPT-5 Image MiniLeader
Design Arena: images12911184Nano Banana 2.1
Design Arena: graphic design13331165Nano Banana 2.1
Design Arena: logos12771209Nano Banana 2.1
LMArena Text to Image1328Not measuredOnly Nano Banana 2.1 measured
LMArena Image Edit1426Not measuredOnly Nano Banana 2.1 measured

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 2.1$0.0053Fits in one request
GPT-5 Image Mini$0.0035Fits in one request

GPT-5 Image Mini costs less

Repository review

50K input + 3K output tokens

Nano Banana 2.1$0.098Fits in one request
GPT-5 Image Mini$0.131Fits in one request

Nano Banana 2.1 costs less

Agent loop

200K input + 10K output tokens

Nano Banana 2.1$0.375Exceeds the context window
GPT-5 Image Mini$0.520Fits in one request

Nano Banana 2.1 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 2.1 and GPT-5 Image Mini
SpecificationGoogle Nano Banana 2.1OpenAI GPT-5 Image Mini
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedOctober 6, 2026October 16, 2025
Context window66K400K
Input $/Mtok$1.50$2.50
Output $/Mtok$7.50$2.00
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Nano Banana 2.1 better than GPT-5 Image Mini for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Compare them on price, context and the boards below.

Which is cheaper, Nano Banana 2.1 or GPT-5 Image Mini?

Nano Banana 2.1 costs $1.50 per million input tokens and $7.50 per million output tokens; GPT-5 Image Mini costs $2.50 and $2.00. Cost per solved task is known for neither of them.

Which has the bigger context window, Nano Banana 2.1 or GPT-5 Image Mini?

GPT-5 Image Mini, with 400K tokens against 66K.

How many benchmarks is the Nano Banana 2.1 vs GPT-5 Image Mini comparison based on?

3 benchmarks have a result for both models as of October 22, 2026. Nano Banana 2.1's coding index rests on 0 independent benchmarks and GPT-5 Image Mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

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