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Model comparison · Updated 10 Oct 2026

Nano Banana 2.1 vs GPT-4o

Nano Banana 2.1 is about 1.7× cheaper on input ($1.50 against $2.50 per 1M tokens) and on output. GPT-4o has the larger context window (128K against 66K tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $1,350 a month for Nano Banana 2.1 and $2,025 for GPT-4o.

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ModelsAtlas. “Nano Banana 2.1 vs GPT-4o”. Retrieved 10 Oct 2026. https://modelsatlas.com/compare/google/gemini-nano-banana-2-1/vs/openai/gpt-4o

Model A

Nano Banana 2.1

by Google · weights not marked open · GRIDE2

Input / 1M
$1.50
observed We measured
Source
Our catalogue
Retrieved
10 Oct 2026
Output / 1M$7.50
Context66K
vs

Model B

GPT-4o

by OpenAI · weights not marked open · GRIDE2

Input / 1M
$2.50
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026
Output / 1M$10.00
Context128K

Key numbers

Standard tier · highlighted = better

Nano Banana 2.1
GPT-4o
Input / 1M tokens
$1.50
$2.50
Output / 1M tokens
$7.50
$10.00
Batch input / output
Not listed
$0.08 / $0.30
Context window
65,536
128,000
Input types
Not disclosed
Not disclosed
Weights
Not marked open
Not marked open
Tiers listed
standard
batch, standard
Prices checked
2026-10-10
2026-09-01

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out
$1,350/mo
$2,025/mo
RAG over documents2k queries/day · 12k in, 500 out
$1,305/mo
$2,100/mo
Coding agent300 tasks/day · 60k in, 8k out
$1,350/mo
$2,070/mo

Nano Banana 2.1   GPT-4o · 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 2.1 and GPT-4o share E2.

Same square as Nano Banana 2.1: GPT-5.2 Chat ($1.75), Mixtral 8x22B Instruct ($2.00), Command R+ (08-2024) ($2.50). Open E2

AFreeB<$0.10C$0.10–0.30D$0.30–1E$1–3F$3–10G$10–30H$30+1<32K232–128K3128–256K4256K–1M51M6>1MINPUT PRICE PER 1M TOKENS →CONTEXT WINDOW ↑ · position within a square follows the real valueGPT-5.2 Chat · E2Mixtral 8x22B Instruct · E2Command R+ (08-2024) · E2GPT Audio · E2GPT-3.5 Turbo Instruct · E1Command A · E3Nano Banana 2.1Nano Banana 2.1GPT-4oGPT-4o
Nano Banana 2.1GPT-4oNearest neighboursOpen weights
View the map as a table (3 squares)
SquarePrice bandContext bandModels
GRIDE1$1–3<32KGPT-3.5 Turbo Instruct
GRIDE2$1–332–128KNano Banana 2.1, GPT-4o, GPT-5.2 Chat, Mixtral 8x22B Instruct, Command R+ (08-2024), GPT Audio
GRIDE3$1–3128–256KCommand A

Capabilities side by side

Only what our records list

Nano Banana 2.1
GPT-4o
Vision input
Not disclosed
Not disclosed
Audio input
Not disclosed
Not disclosed
Open weights
Not marked open
Not marked open
Batch tier
Not listed
Supported
Free tier
Not listed
Not listed
Thinking tier
Not listed
Not listed

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

Which should you choose?

Editorial

Choose Nano Banana 2.1 if…

  • you pay by the token: it costs $1.50 per 1M input against $2.50
  • output dominates your bill: $7.50 per 1M output against $10.00

Choose GPT-4o if…

  • your prompts are long: it takes 128,000 tokens against 65,536
  • 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 2.1 better than GPT-4o?
We do not benchmark quality, so we cannot say. On the recorded numbers: Nano Banana 2.1 is about 1.7× cheaper on input ($1.50 against $2.50 per 1M tokens) and on output. GPT-4o has the larger context window (128K against 66K tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $1,350 a month for Nano Banana 2.1 and $2,025 for GPT-4o. Which is better for you depends on your task; test both on your own prompts.
Which is cheaper, Nano Banana 2.1 or GPT-4o?
Nano Banana 2.1: $1.50 against $2.50 per 1M input tokens, and $7.50 against $10.00 per 1M output, on standard pricing.
How much does each cost per 1M tokens?
Nano Banana 2.1: $1.50 input and $7.50 output. GPT-4o: $2.50 input and $10.00 output. Standard tier, USD.
Which has the larger context window?
GPT-4o, with 128,000 tokens. Nano Banana 2.1 has 65,536 tokens.
Do both offer batch pricing?
Nano Banana 2.1 lists no batch tier. GPT-4o lists a batch tier, at 50% of its standard price.
Can both read images or audio?
Input types recorded for Nano Banana 2.1: none recorded. For GPT-4o: 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 2.1: not marked open-weight in our records. GPT-4o: 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 $1,350 a month for Nano Banana 2.1 and $2,025 for GPT-4o. This is our calculation from the listed prices, not a quote.

About the two models

Nano Banana 2.1

By Google. $1.50 input and $7.50 output per 1M tokens, 66K context, atlas square E2. Tiers listed: standard.

Full specs & pricing →

GPT-4o

By OpenAI. $2.50 input and $10.00 output per 1M tokens, 128K context, atlas square E2. Tiers listed: batch, standard.

Full specs & pricing →

Keep going in your AI

Opens with this page as the source. We add nothing else to the prompt.