Context Window

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Nano Banana Pro (Gemini 3 Pro Image Preview) vs Gpt Realtime 1 5

This page is context-first: how much text each model can take in one request. Full specs adds capabilities and limits; the pricing matrix below is only about $/million tokens from hosts that list both models.

Google

Model

Nano Banana Pro (Gemini 3 Pro Image Preview)

Image input

Context window

66K

65,536 tokens · ~49K words

Model page
Openai

Model

Gpt Realtime 1 5

Tool calling

Context window

32K

32,000 tokens · ~24K words

Model page

Context window · side by side

Bar length is relative to the larger of the two windows (100% = max of this pair). This is not pricing.

Nano Banana Pro (Gemini 3 Pro Image Preview)66K
Gpt Realtime 1 532K

Nano Banana Pro (Gemini 3 Pro Image Preview) has about 2× the context window of the other in this pair.

Token calculator →Memory savings →

Nano Banana Pro (Gemini 3 Pro Image Preview) has 104% more context capacity (65K vs 32K tokens).

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use Nano Banana Pro (Gemini 3 Pro Image Preview). Its 65K context fits entire documents without chunking (vs 32K).

  • Long output (reports, code files)

    Use Nano Banana Pro (Gemini 3 Pro Image Preview). Its 32K max output lets you generate complete artifacts in one request.

Full specs

Context, output, capabilities, and dates. Green highlights the favorable value where we compute a winner.

SpecNano Banana Pro (Gemini 3 Pro Image Preview)Gpt Realtime 1 5
Context window65,536 tokens (65K)32,000 tokens (32K)
Max output tokens32,768 tokens (32K)4,096 tokens (4K)
Speed tierFastBalanced
VisionYesNo
Function callingNoYes
Extended thinkingYesNo
Prompt cachingYesYes
Batch APINoNo
Release dateNov 2025N/A

Pricing matrix

Dollar rates only: hosts that list both models, per 1M tokens. For how much text fits, use the context section above — not this table.

ProviderNano Banana Pro (Gemini 3 Pro Image Preview) inNano Banana Pro (Gemini 3 Pro Image Preview) outGpt Realtime 1 5 inGpt Realtime 1 5 out
Openai——$4.00/M$16.00/M

Frequently asked questions

Nano Banana Pro (Gemini 3 Pro Image Preview) has a larger context window: 65K tokens vs 32K. For long documents, large codebases, or extended agent sessions, the larger context window reduces the need to chunk inputs or summarize history.

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