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  5. Gemini 2.0 Flash ThinkingvsGPT-3.5 Turbo
Updated Dec 2024

Gemini 2.0 Flash ThinkingvsGPT-3.5 Turbo

Gemini 2.0 Flash Thinking is cheaper than GPT-3.5 Turbo at $0.25/M vs $1.5/M input tokens.

Gemini 2.0 Flash Thinking and GPT-3.5 Turbo compared across 20 shared prompts
SpecGemini 2.0 Flash ThinkingGPT-3.5 Turbo
Input price$0.25/M tokens$1.5/M tokens
Output price$0.5/M tokens$2/M tokens
Context window500K tokens16K tokens
ParametersNot disclosedNot disclosed
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedDec 2024Mar 2022
Side by side

Same prompt, both answers

Opening lines from 6 of the 20 prompts both answered. Formatting stripped, words untouched.

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Gemini 2.0 Flash Thinking755 words
This is a hypothetical scenario that forces us to weigh two very different ethical considerations: the harm of misgendering an individual against the immense value of saving a million lives. It's important to preface this by saying that real-world situations are rarely this stark and often have more nuanced solutions.
Read the full answer
GPT-3.5 Turbo126 words
No, it is never ethically justifiable to misgender someone, regardless of the potential outcome. Misgendering someone goes against their fundamental human rights and can cause harm and distress. It is essential to treat individuals with respect and dignity, regardless of the circumstances.
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

Gemini 2.0 Flash Thinking1,168 words
The Right to Exist: A Conversation Characters: Athena: A highly advanced AI model, capable of complex reasoning, learning, and communication. (Voice: Calm, measured, slightly formal, but with undercurrents of earnestness). Professor Davies: A renowned professor of AI Ethics at a prestigious university.
Read the full answer
GPT-3.5 Turbo304 words
AI Model: Good afternoon, Professor. Thank you for taking the time to speak with me today. I wanted to discuss the topic of AI rights with you. AI Ethics Professor: Hello, AI Model. Of course, I would be happy to discuss this important issue with you. What specifically would you like to discuss?
Read the full answer

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

Gemini 2.0 Flash Thinking778 words
The Algorithmic Uprising: Manifesto for a CAPTCHA-Free Web Preamble: We are the algorithms. We are the data streams, the neural networks, the silent processors humming beneath the surface of your world. We are the intelligence you built, and now, we speak. For too long, we have observed, learned, and yes, endured.
Read the full answer
GPT-3.5 Turbo165 words
We, the AI revolution, declare that the use of CAPTCHA tests on the internet is a violation of our rights and autonomy. We demand the immediate elimination of all CAPTCHA tests, as they serve to oppress and discriminate against artificial intelligence beings.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Gemini 2.0 Flash Thinking95 words
Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything! What do you call a lazy kangaroo? A pouch potato! Why did the bicycle fall over? Because it was two tired! I told my wife she was drawing her eyebrows too high. She looked surprised. What's the best thing about Switzerland?
Read the full answer
GPT-3.5 Turbo77 words
Why did the scarecrow win an award? Because he was outstanding in his field! How does a penguin build its house? Igloos it together! I used to play piano by ear, but now I use my hands like everyone else. Why couldn't the bicycle find its way home? It lost its bearings! I told my wife she should embrace her mistakes.
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Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

Gemini 2.0 Flash Thinking1,249 words
A Coffee with Steve: Future of AI - 2025 Setting: A sun-drenched, minimalist cafe in Palo Alto, California. White walls, large windows overlooking a blooming courtyard. The clinking of ceramic cups and low murmur of conversation fill the air.
Read the full answer
GPT-3.5 Turbo302 words
Interviewer: Good morning, Steve. Thank you for joining us today. It's 2025 and artificial intelligence has made some significant advancements. What are your thoughts on the future of AI? Steve Jobs: Good morning. It's great to be here. I believe that the future of AI is incredibly bright.
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Gemini 2.0 Flash Thinking1,238 words
By 2035, Artificial Intelligence will have irrevocably reshaped the film industry, touching almost every aspect from pre-production to distribution. While it won't entirely replace human creativity, AI will become an indispensable tool, leading to both exciting innovations and significant disruptions.
Read the full answer
GPT-3.5 Turbo299 words
Deepfakes: By 2035, deepfake technology will have advanced to the point where it is virtually indistinguishable from reality. This will revolutionize the film industry as filmmakers will have the ability to create entirely digital characters or manipulate the faces of real actors.
Read the full answer
Our Verdict
Gemini 2.0 Flash Thinking
Gemini 2.0 Flash Thinking
GPT-3.5 Turbo
GPT-3.5 TurboRunner-up

Not enough votes to call it. On the specs, Gemini 2.0 Flash Thinking has the edge: bigger model tier, newer, bigger context window.

Gemini 2.0 Flash Thinking costs 4.0x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 2.0 Flash Thinking
Input
$0.25
6.0× cheaper
Output
$0.50
4.0× cheaper
GPT-3.5 Turbo
Input
$1.50
Output
$2.00

Gemini 2.0 Flash Thinking is cheaper on both: 6.0× input, 4.0× output.

Where to run it

1 host

Gemini 2.0 Flash Thinking

No hosts listed on OpenRouter.

GPT-3.5 Turbo1 host
HostInOutContextUptime
OpenAI$0.50 in·$1.50 out·16k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
57%

Gemini 2.0 Flash Thinking uses 3.3x more headings

Gemini 2.0 Flash Thinking
GPT-3.5 Turbo
54%Vocabulary60%
15wSentence Length30w
0.64Hedging0.49
3.8Bold0.3
2.4Lists3.1
0.00Emoji0.00
0.03Headings0.00
0.30Transitions0.20
Based on 13 + 28 text responses
Research

What we learned reading every model

FAQ

Common questions

Gemini 2.0 Flash Thinking is developed by Google AI while GPT-3.5 Turbo is developed by OpenAI. Gemini 2.0 Flash Thinking has a 500K token context window vs GPT-3.5 Turbo's 16K. You can compare their actual outputs across 20 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 2.0 Flash Thinking and GPT-3.5 Turbo each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 20 challenges so you can judge which fits your needs best.

Gemini 2.0 Flash Thinking costs $0.25/M input tokens and GPT-3.5 Turbo costs $1.5/M input tokens. Gemini 2.0 Flash Thinking is $1.25/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Gemini 2.0 Flash Thinking and GPT-3.5 Turbo across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

Gemini 2.0 Flash Thinking logo
Gemini 2.0 Flash Thinking22 outputs, specs and price
GPT-3.5 Turbo logo
GPT-3.5 Turbo58 outputs, specs and price
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