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GPT-3.5 Turbo (older v0613) vs Nano Banana 2 (Gemini 3.1 Flash Image Preview)

How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-3.5 Turbo (older v0613) and Nano Banana 2 (Gemini 3.1 Flash Image Preview).

OpenAI

GPT-3.5 Turbo (older v0613)

GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021.

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Google

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines...

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Technical Specifications

SpecificationGPT-3.5 Turbo (older v0613)Nano Banana 2 (Gemini 3.1 Flash Image Preview)
ProviderOpenAIGoogle
Context Window4,095 tokens131,072 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apimanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2024-01-252026-02-26

API Pricing Comparison

Input Price per Million Tokens

GPT-3.5 Turbo (older v0613)

$1.00

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

$0.50

Output Price per Million Tokens

GPT-3.5 Turbo (older v0613)

$2.00

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

$3.00

Want to test both models live?

Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.

Benchmark Performance Metrics

Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.

GPT-3.5 Turbo (older v0613) Quirks & Gotchas

No developer gotchas reported.

Nano Banana 2 (Gemini 3.1 Flash Image Preview) Quirks & Gotchas

No developer gotchas reported.