Context Window

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Nano Banana 2 (Gemini 3.1 Flash 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 2 (Gemini 3.1 Flash 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 2 (Gemini 3.1 Flash Image Preview)66K
Gpt Realtime 1 532K

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has about 2× the context window of the other in this pair.

Token calculator →Memory savings →

Nano Banana 2 (Gemini 3.1 Flash 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 2 (Gemini 3.1 Flash Image Preview). Its 65K context fits entire documents without chunking (vs 32K).

  • Long output (reports, code files)

    Use Nano Banana 2 (Gemini 3.1 Flash Image Preview). Its 65K 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 2 (Gemini 3.1 Flash Image Preview)Gpt Realtime 1 5
Context window65,536 tokens (65K)32,000 tokens (32K)
Max output tokens65,536 tokens (65K)4,096 tokens (4K)
Speed tierFastBalanced
VisionYesNo
Function callingNoYes
Extended thinkingYesNo
Prompt cachingNoYes
Batch APINoNo
Release dateFeb 2026N/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 2 (Gemini 3.1 Flash Image Preview) inNano Banana 2 (Gemini 3.1 Flash Image Preview) outGpt Realtime 1 5 inGpt Realtime 1 5 out
Openai——$4.00/M$16.00/M

Frequently asked questions

Nano Banana 2 (Gemini 3.1 Flash 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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