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Gemini 2.5 Flash vs GPT-3.5 Turbo 16k

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 Gemini 2.5 Flash and GPT-3.5 Turbo 16k.

Google

Gemini 2.5 Flash

Gemini 2.5 Flash is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks. It includes built-in "thinking" capabilities, enabling it to provide responses with greater...

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OpenAI

GPT-3.5 Turbo 16k

This model offers four times the context length of gpt-3.5-turbo, allowing it to support approximately 20 pages of text in a single request at a higher cost. Training data: up...

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Technical Specifications

SpecificationGemini 2.5 FlashGPT-3.5 Turbo 16k
ProviderGoogleOpenAI
Context Window1,048,576 tokens16,385 tokens
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apimanaged api
Production Stabilitybetastable
API AvailableYesYes
Released Date2025-06-172023-08-28

API Pricing Comparison

Input Price per Million Tokens

Gemini 2.5 Flash

$0.30

GPT-3.5 Turbo 16k

$3.00

Output Price per Million Tokens

Gemini 2.5 Flash

$2.50

GPT-3.5 Turbo 16k

$4.00

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.

Gemini 2.5 Flash Quirks & Gotchas

No developer gotchas reported.

GPT-3.5 Turbo 16k Quirks & Gotchas

No developer gotchas reported.