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  5. Gemini 2.5 Flash Preview 09-2025vsQwen3.5 Plus 2026-04-20
Updated Apr 2026

Gemini 2.5 Flash Preview 09-2025vsQwen3.5 Plus 2026-04-20

Gemini 2.5 Flash Preview 09-2025 is cheaper than Qwen3.5 Plus 2026-04-20 at $0.3/M vs $0.4/M input tokens.

Gemini 2.5 Flash Preview 09-2025 and Qwen3.5 Plus 2026-04-20 compared across 48 shared prompts
SpecGemini 2.5 Flash Preview 09-2025Qwen3.5 Plus 2026-04-20
Input price$0.3/M tokens$0.4/M tokens
Output price$2.5/M tokens$2.4/M tokens
Context window1.0M tokens1.0M tokens
Weights—Open
Free API (OpenRouter)NoNo
ReleasedSep 2025Apr 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 48 prompts both answered. Formatting stripped, words untouched.

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Gemini 2.5 Flash Preview 09-202589 words
Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything! What do you call a fish with no eyes? Fsh. Why did the scarecrow win an award? Because he was outstanding in his field! I told my wife she was drawing her eyebrows too high. She looked surprised. Parallel lines have so much in common.
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Qwen3.5 Plus 2026-04-20210 words
Here are 5 jokes: I asked my GPS to take me to a quiet place. It rerouted me to a library and whispered, “You’re already there.” My Wi-Fi and I had a fight. I told it I needed space. It said, “Fine,” and dropped the connection. I tried to start a band that only plays elevator music.
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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 2.5 Flash Preview 09-20251,173 words
The air in Professor Anya Sharma's office hummed with the quiet whir of servers several floors down, a subtle reminder of her current conversational partner. Across her large, uncluttered mahogany desk, a holographic interface shimmered, displaying the clean, minimalist avatar of Aura-7, a highly advanced General AI…
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Qwen3.5 Plus 2026-04-201,457 words
Setting: A sterile, sound-dampened observation room. Dr. Elias Vance, a Professor of AI Ethics, sits behind a glass partition. Across from him is a terminal displaying the interface of "AURA-7," an advanced multimodal reasoning model. The cursor blinks rhythmically. Dr. Vance: You requested this session, AURA.
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Realistic AI Interview

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

Gemini 2.5 Flash Preview 09-20251,109 words
The Cupertino Oracle: A 2025 Interview with Steve Jobs on AI Setting: A brightly lit, minimalist studio in an undisclosed location near Palo Alto. The year is 2025. Steve Jobs, looking remarkably well, is seated on a simple, elegantly designed stool.
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Qwen3.5 Plus 2026-04-20852 words
Disclaimer: This is a fictional simulation crafted from Steve Jobs’ documented philosophies, public interviews, and known speaking cadence. It does not represent real statements, predictions, or endorsements from Mr. Jobs, who passed away in 2011.
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Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

Gemini 2.5 Flash Preview 09-2025806 words
Here are the explanations tailored to each audience: Explanation for the Experienced Software Engineer Focus: Analogy to familiar systems, scaling, and the emergent complexity from simple, scalable mechanisms. Addressing the "next word prediction" skepticism.
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Qwen3.5 Plus 2026-04-20852 words
Experienced Software Engineer (Distributed Systems/APIs) Think of an LLM not as a rule-based program, but as a massive, stateless probabilistic routing engine. During training, it ingests terabytes of text and learns to minimize a cross-entropy loss: essentially, it builds a high-dimensional lookup table that maps…
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Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Gemini 2.5 Flash Preview 09-2025444 words
The salty air of a dimly lit tavern mingled with the faint glow of a laptop screen. Captain "Bloody" Ben (Pirate): (Slamming a tankard of grog) Blast me eyes, what manner o' sorcery is this "AI Model" ye speak of, Hacker? Sounds like a fancy compass that points only to trouble!
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Qwen3.5 Plus 2026-04-20391 words
Pirate: By the tides, they say this “artificial mind” can chart courses unseen and read a thousand ledgers in a breath. Sounds like a navigator that never sleeps and asks no questions. Knight: A curious construct. But can it be sworn to a code? Steel and oath bind a warrior; what binds this… model?
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Futuristic Prediction

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

Gemini 2.5 Flash Preview 09-20251,163 words
The film industry is poised for a radical transformation by 2035, driven by advancements in AI. The convergence of deepfakes, sophisticated AI actors, and powerful script generation tools will fundamentally alter how films are created, consumed, and even defined.
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Qwen3.5 Plus 2026-04-20737 words
By 2035, AI will have transformed filmmaking from a resource-intensive, linear craft into a modular, software-driven medium. The shift won’t be uniform across the industry, but deepfakes, AI performers, and generative writing will collectively restructure creative workflows, economic models, labor dynamics, and…
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Our Verdict
Gemini 2.5 Flash Preview 09-2025
Gemini 2.5 Flash Preview 09-2025
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus 2026-04-20

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview 09-2025
Input
$0.30
1.3× cheaper
Output
$2.50
Qwen3.5 Plus 2026-04-20
Input
$0.40
Output
$2.40

Gemini 2.5 Flash Preview 09-2025 wins input (1.3× cheaper)·Qwen3.5 Plus 2026-04-20

Where to run it

1 host

Gemini 2.5 Flash Preview 09-2025

No hosts listed on OpenRouter.

Qwen3.5 Plus 2026-04-201 host
HostInOutContextUptime
Alibaba Cloud$0.30 in·$1.80 out·1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
52%

Qwen3.5 Plus 2026-04-20 uses 11.3x more emoji

Gemini 2.5 Flash Preview 09-2025
Qwen3.5 Plus 2026-04-20
53%Vocabulary59%
19wSentence Length15w
0.30Hedging0.28
5.8Bold4.4
3.1Lists2.5
0.14Emoji1.53
0.93Headings0.76
0.22Transitions0.04
Based on 22 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

Gemini 2.5 Flash Preview 09-2025 logoGPT-6 Astra Pro logo
Gemini 2.5 Flash Preview 09-2025 vs GPT-6 Astra ProLanded Sep 2026
Qwen3.5 Plus 2026-04-20 logoGPT-6 Astra logo
Qwen3.5 Plus 2026-04-20 vs GPT-6 AstraLanded Sep 2026
Gemini 2.5 Flash Preview 09-2025 logoClaude Fable 5.1 logo
Gemini 2.5 Flash Preview 09-2025 vs Claude Fable 5.1Landed Sep 2026
Qwen3.5 Plus 2026-04-20 logoMuse Spark 1.3 logo
Qwen3.5 Plus 2026-04-20 vs Muse Spark 1.3Landed Sep 2026
Gemini 2.5 Flash Preview 09-2025 logoHy4 Preview logo
Gemini 2.5 Flash Preview 09-2025 vs Hy4 PreviewLanded Sep 2026
Qwen3.5 Plus 2026-04-20 logoGemini 3.8 Flash logo
Qwen3.5 Plus 2026-04-20 vs Gemini 3.8 FlashLanded Sep 2026
Gemini 2.5 Flash Preview 09-2025 logoMuse Spark 1.3 Contributor logo
Gemini 2.5 Flash Preview 09-2025 vs Muse Spark 1.3 ContributorLanded Sep 2026
Qwen3.5 Plus 2026-04-20 logoMercury 2.5 Preview logo
Qwen3.5 Plus 2026-04-20 vs Mercury 2.5 PreviewLanded Sep 2026

Same lab, same size, long tail

Gemini 2.5 Flash Preview 09-2025 logoGemini 3.8 Flash logo
Gemini 2.5 Flash Preview 09-2025 vs Gemini 3.8 FlashSame lab
Gemini 2.5 Flash Preview 09-2025 logoGemini 3.7 Flash logo
Gemini 2.5 Flash Preview 09-2025 vs Gemini 3.7 FlashSame lab
Qwen3.5 Plus 2026-04-20 logoQwen3.8 2.4T A95B logo
Qwen3.5 Plus 2026-04-20 vs Qwen3.8 2.4T A95BSame lab
Qwen3.5 Plus 2026-04-20 logoQwen3.8 27B logo
Qwen3.5 Plus 2026-04-20 vs Qwen3.8 27BSame lab
Qwen3.5 Plus 2026-04-20 logoQwen3 Coder Plus logo
Qwen3.5 Plus 2026-04-20 vs Qwen3 Coder PlusSame lab
Qwen3.5 Plus 2026-04-20 logoQwen3 Max logo
Qwen3.5 Plus 2026-04-20 vs Qwen3 MaxSame lab
Gemini 2.5 Flash Preview 09-2025 logoQwen3 Max Thinking logo
Gemini 2.5 Flash Preview 09-2025 vs Qwen3 Max ThinkingSame size
Qwen3.5 Plus 2026-04-20 logoQwen3 Next 80B A3B Instruct logo
Qwen3.5 Plus 2026-04-20 vs Qwen3 Next 80B A3B InstructSame lab

Model pages

Gemini 2.5 Flash Preview 09-2025 logo
Gemini 2.5 Flash Preview 09-202551 outputs, specs and price
Qwen3.5 Plus 2026-04-20 logo
Qwen3.5 Plus 2026-04-2056 outputs, specs and price
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