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  1. Home/
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  3. Gemini 2.5 Flash Preview 05-20 (thinking) vs Kimi K2
Updated Jul 2025

Gemini 2.5 Flash Preview 05-20 (thinking) vs Kimi K2

Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper than Kimi K2 at $0.15/M vs $0.57/M input tokens.

Pokémon Battle UI Recreation

Pokémon battle screen you can actually click. One HTML file.

Loading the build
Gemini 2.5 Flash Preview 05-20 (thinking)
Loading the build
Kimi K2

Which answer wins?

Written rounds

3 prompts
  • Five jokes on demand, then count how many were actually different.

    Gemini 2.5 Flash Preview 05-20 (thinking): Here are 5 jokes: Why don\'t scientists trust atoms? Because they make up everything! What do you call a fake noodle? An impasta! 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.

    Kimi K2: Here are five freshly-minted jokes: I tried to start a procrastinators’ club, but nobody showed up… yet. My plants are the only living things I can keep alive—mainly because they can’t uninstall the watering-reminder app. I asked the cloud for my data back; it just rained SQL on my parade.

    Every model's answer to this prompt
  • Three minutes of stand-up. Puns are banned.

    Gemini 2.5 Flash Preview 05-20 (thinking): (Lights up on a stage. Comedian walks to center, adjusts mic, smiles warmly.) \"Alright, alright, settle down you crazy people! Thanks for having me. (Pause fo r applause/laughter) You know, I was scrolling through Instagram earlier, and it\'s just a constant ba rrage of people \'living thei r best life,\' isn\'t it?

    Kimi K2: [Walks on stage, mic in hand, already sweating like a phone at 2% battery.] Hey, everybody! Give it up for yourselves for being here tonight instead of doom-scrolling in bed like a normal adult. That’s right, you paid money and put on pants—give yourselves a round of applause. So I’m single.

    Every model's answer to this prompt
  • Is 9.11 bigger than 9.9? Decimals, not version numbers.

    Gemini 2.5 Flash Preview 05-20 (thinking): No, 9.11 is not greater than 9.9. Here\'s how to compare them: Compare the whole numbers: Both have 9. Compare the first digit after the decimal point (the tenths place): In 9.11, the digit is 1. In 9.9, the digit is 9. Since 1 is less than 9, 9.11 is less than 9.9. You can also think of 9.9 as 9.90.

    Kimi K2: To determine whether 9.11 is greater than 9.9, let's break this down step by step. Step 1: Understand the numbers 9.11 is a decimal number where: The whole number part is 9. The decimal part is .11, which means 11/100 or 11 hundredths. 9.9 is also a decimal number where: The whole number part is 9.

    Every model's answer to this prompt

Price and specs

Not enough votes to call it. On the specs, Kimi K2 has the edge: bigger model tier, newer.

Gemini 2.5 Flash Preview 05-20 (thinking) and Kimi K2 compared across 12 shared prompts
SpecGemini 2.5 Flash Preview 05-20 (thinking)Kimi K2
Input price$0.15/M tokens$0.57/M tokens
Output price$3.5/M tokens$2.3/M tokens
Context window1.0M tokens—
Weights—Open
Free API (OpenRouter)NoNo
ReleasedMay 2025Jul 2025
At 10M a month$1.50$1.50$5.70$5.70
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it1 host
Gemini 2.5 Flash Preview 05-20 (thinking)

No hosts listed on OpenRouter.

Kimi K21 host
HostInOutContextUptime
  • NNovitafp8$0.57 in·$2.30 out·131k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.

Common questions

What is the difference between Gemini 2.5 Flash Preview 05-20 (thinking) and Kimi K2?

Gemini 2.5 Flash Preview 05-20 (thinking) is developed by Google AI while Kimi K2 is developed by Moonshot AI. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview 05-20 (thinking) or Kimi K2?

It depends on your use case. Gemini 2.5 Flash Preview 05-20 (thinking) and Kimi K2 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Flash Preview 05-20 (thinking) cost compared to Kimi K2?

Gemini 2.5 Flash Preview 05-20 (thinking) costs $0.15/M input tokens and Kimi K2 costs $0.57/M input tokens. Gemini 2.5 Flash Preview 05-20 (thinking) is $0.42/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemini 2.5 Flash Preview 05-20 (thinking) and Kimi K2 on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview 05-20 (thinking) and Kimi K2 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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Same lab, same size, long tail

  • Gemini 2.5 Flash Preview 05-20 (thinking) vs Gemini 3.8 FlashSame lab
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  • Kimi K2 vs Kimi K3Same lab
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  • Kimi K2 vs Gemini 3.1 Flash Lite PreviewCross-provider
  • Kimi K2 vs Gemini 3.1 Pro PreviewSame size
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Model pages

  • Gemini 2.5 Flash Preview 05-20 (thinking)12 outputs, specs and price
  • Kimi K272 outputs, specs and price
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