Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Google: Gemini 3.1 Pro Preview vs Nano Banana 2 (Gemini 3.1 Flash Image) benchmark

Name: Google: Gemini 3.1 Pro Preview vs Nano Banana 2 (Gemini 3.1 Flash Image) AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

Comparing verified benchmark accuracy, speed, and token pricing between Google: Gemini 3.1 Pro Preview and Nano Banana 2 (Gemini 3.1 Flash Image). Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Share Analysis:Share:

WhatsApp Telegram X LinkedIn

Executive Verdict Summary

Google: Gemini 3.1 Pro Preview holds empirical advantage (0 of 0 metrics)

Coding / SWESWE-bench

Google: Gemini 3.1 Pro PreviewTop code solve rate

ReasoningGPQA / Live

Google: Gemini 3.1 Pro PreviewTop logical accuracy

Best Value$/1M Tok

Google: Gemini 3.1 Pro PreviewLowest API billing cost

Speed / TokTok/Sec

Google: Gemini 3.1 Pro PreviewFastest stream rate

Google

Google: Gemini 3.1 Pro Preview

Auto-discovered from OpenRouter (google/gemini-3.1-pro-preview). Preview until a second source matches.

Google

Nano Banana 2 (Gemini 3.1 Flash Image)

Google high-speed multimodal generative model delivering top Elo performance at half the latency and cost of Pro.

Flash ImageImg Elo 1,323$67/1k imgs

Top Rival Showdowns for Google: Gemini 3.1 Pro Preview

All Matchups

Compare vs:vs GPT Image 2 (High)vs Reve 2.1 vs FLUX.2 [max]vs Ideogram 4.0 (Quality)vs Recraft V4.1 Utility Pro

Image Quality Leader

No shared data

Single model data

Generation Speed Leader

No shared data

No latency data

Value per Dollar Leader

No shared data

Unpriced

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

Google: Gemini 3.1 Pro Preview (0)vsNano Banana 2 (Gemini 3.1 Flash Image) (5)

Google: Gemini 3.1 Pro Preview: 0W (0%)Nano Banana 2 (Gemini 3.1 Flash Image): 5W (100%)

← Google: Gemini 3.1 Pro PreviewNano Banana 2 (Gemini 3.1 Flash Image) →

🏆Nano Banana 2 (Gemini 3.1 Flash Image) Leads(3/3)

Visual Quality & Adherence

Arena Preference Elo, prompt fidelity & typography score

Benchmark

Google: Gemini 3.1 Pro PreviewvsNano Banana 2 (Gemini 3.1 Flash Image)

Image Elo

—vs1,323

Prompt adherence

—vs93.8%

Text rendering

—vs94.2%

Google: Gemini 3.1 Pro Preview: 0WNano Banana 2 (Gemini 3.1 Flash Image): 3W

🏆Nano Banana 2 (Gemini 3.1 Flash Image) Leads(1/1)

Generation Latency

Time to render full-resolution image snapshot (seconds)

Benchmark

Google: Gemini 3.1 Pro PreviewvsNano Banana 2 (Gemini 3.1 Flash Image)

Generation time

—vs2.5s

Google: Gemini 3.1 Pro Preview: 0WNano Banana 2 (Gemini 3.1 Flash Image): 1W

🏆Nano Banana 2 (Gemini 3.1 Flash Image) Leads(1/1)

Cost Efficiency

API inference cost per 1,000 generated images

Benchmark

Google: Gemini 3.1 Pro PreviewvsNano Banana 2 (Gemini 3.1 Flash Image)

Price per 1k images

—vs$67/1k

Google: Gemini 3.1 Pro Preview: 0WNano Banana 2 (Gemini 3.1 Flash Image): 1W

Side-by-Side Benchmark Matrix

Google: Gemini 3.1 Pro PreviewNano Banana 2 (Gemini 3.1 Flash Image)

Image Elo

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)1,323

Generation time

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)2.5s

Price per 1k images

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)$67/1k

Prompt adherence

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)93.8%

Text rendering

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)94.2%

Benchmark	Google: Gemini 3.1 Pro Preview	Nano Banana 2 (Gemini 3.1 Flash Image)	Advantage Delta
Image Elo	—	1,323 seed-bootstrap · Aug 1, 2026	—
Generation time	—	2.5s seed-bootstrap · Aug 1, 2026	—
Price per 1k images	—	$67/1k seed-bootstrap · Aug 1, 2026	—
Prompt adherence	—	93.8% seed-bootstrap · Aug 1, 2026	—
Text rendering	—	94.2% seed-bootstrap · Aug 1, 2026	—

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save 100% with Google: Gemini 3.1 Pro Preview

Monthly Image Production Volume25k images / month (25000 imgs)

Quick Presets:

Google: Gemini 3.1 Pro Preview$0.00 / mo

Rate: $0/1k

Nano Banana 2 (Gemini 3.1 Flash Image)$1,675.00 / mo

Rate: $67/1k

Estimated Cost Delta

Google: Gemini 3.1 Pro Preview is estimated to save $1,675.00/month ($20,100/year).

Based on 25k images generated

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatinsufficient data

Need list prices.

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGinsufficient data

Need context sizes.

Screenshots / visionNano Banana 2 (Gemini 3.1 Flash Image)

Nano Banana 2 (Gemini 3.1 Flash Image) is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	insufficient data	Need list prices.
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	insufficient data	Need context sizes.
Screenshots / vision	Nano Banana 2 (Gemini 3.1 Flash Image)	Nano Banana 2 (Gemini 3.1 Flash Image) is the side marked multimodal in the catalog.

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

No comments posted on this matchup yet. Be the first to share an evaluation note!

Social Share Card Preview

Dynamic OpenGraph banner generated at /compare/gemini-3-1-pro-preview-vs-nano-banana-2/opengraph-image

Save PNG

CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK

Google

Google: Gemini 3.1 Pro Preview

Elo n/a

SWE-bench—

Speed (tok/s)1M

Input / 1M Tokens$2/1M

Output / 1M Tokens$12/1M

Google

Nano Banana 2 (Gemini 3.1 Flash Image)

Elo n/a

SWE-bench—

Speed (tok/s)—

Input / 1M Tokens$67/1k

Output / 1M Tokens$67/1k

Frequently Asked Questions

Which is better overall, Google: Gemini 3.1 Pro Preview or Nano Banana 2 (Gemini 3.1 Flash Image)?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Google: Gemini 3.1 Pro Preview or Nano Banana 2 (Gemini 3.1 Flash Image)?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: List prices are missing for at least one model.
Which is faster, Google: Gemini 3.1 Pro Preview or Nano Banana 2 (Gemini 3.1 Flash Image)?: We do not have TTFT for both models.
Which has the larger context window?: Context window is missing for at least one model.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Google: Gemini 3.1 Pro Preview and Nano Banana 2 (Gemini 3.1 Flash Image) Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Google: Gemini 3.1 Pro Preview matchups →|All Nano Banana 2 (Gemini 3.1 Flash Image) matchups →

Nano Banana 2 (Gemini 3.1 Flash Image) vs Nano Banana Pro (Gemini 3 Pro Image) (previous nano-banana)Nano Banana 2 (Gemini 3.1 Flash Image) vs Nano Banana 2 Lite (next nano-banana)GPT Image 2 (High) vs Nano Banana 2 (Gemini 3.1 Flash Image)Reve 2.1 vs Nano Banana 2 (Gemini 3.1 Flash Image)FLUX.2 [max] vs Nano Banana 2 (Gemini 3.1 Flash Image)FLUX.2 [flex] vs Nano Banana 2 (Gemini 3.1 Flash Image)

Side-by-Side Benchmark Matrix

Google: Gemini 3.1 Pro PreviewNano Banana 2 (Gemini 3.1 Flash Image)

Image Elo

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)1,323

Generation time

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)2.5s

Price per 1k images

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)$67/1k

Prompt adherence

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)93.8%

Text rendering

Google: Gemini 3.1 Pro Preview—

Nano Banana 2 (Gemini 3.1 Flash Image)94.2%

Benchmark	Google: Gemini 3.1 Pro Preview	Nano Banana 2 (Gemini 3.1 Flash Image)	Advantage Delta
Image Elo	—	1,323 seed-bootstrap · Aug 1, 2026	—
Generation time	—	2.5s seed-bootstrap · Aug 1, 2026	—
Price per 1k images	—	$67/1k seed-bootstrap · Aug 1, 2026	—
Prompt adherence	—	93.8% seed-bootstrap · Aug 1, 2026	—
Text rendering	—	94.2% seed-bootstrap · Aug 1, 2026	—

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatinsufficient data

Need list prices.

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGinsufficient data

Need context sizes.

Screenshots / visionNano Banana 2 (Gemini 3.1 Flash Image)

Nano Banana 2 (Gemini 3.1 Flash Image) is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	insufficient data	Need list prices.
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	insufficient data	Need context sizes.
Screenshots / vision	Nano Banana 2 (Gemini 3.1 Flash Image)	Nano Banana 2 (Gemini 3.1 Flash Image) is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Google: Gemini 3.1 Pro Preview or Nano Banana 2 (Gemini 3.1 Flash Image)?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, Google: Gemini 3.1 Pro Preview or Nano Banana 2 (Gemini 3.1 Flash Image)?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

List prices are missing for at least one model.

Which is faster, Google: Gemini 3.1 Pro Preview or Nano Banana 2 (Gemini 3.1 Flash Image)?

We do not have TTFT for both models.

Which has the larger context window?

Context window is missing for at least one model.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Google: Gemini 3.1 Pro Preview and Nano Banana 2 (Gemini 3.1 Flash Image) Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.