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  1. Home/
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  3. Gemini 2.5 Flash Preview 05-20 (thinking) vs Grok 3 Thinking
Updated May 2025

Gemini 2.5 Flash Preview 05-20 (thinking) vs Grok 3 Thinking

Gemini 2.5 Flash Preview 05-20 (thinking) has a larger context window than Grok 3 Thinking (1.0M tokens vs 128K tokens).

Interactive Catan Board

Hex grid you can resize with a slider. Geometry plus state.

Loading the build
Gemini 2.5 Flash Preview 05-20 (thinking)
Loading the build
Grok 3 Thinking

Which answer wins?

Written rounds

3 prompts
  • 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?

    Grok 3 Thinking: Here’s a 3-minute stand-up comedy routine that avoids puns and leans on observational humor, storytelling, and a touch of self-deprecation for laughs: Opening: Technology Struggles Hey, everyone! How’s it going?

    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.

    Grok 3 Thinking: To determine whether 9.11 is greater than 9.9, let's compare the two numbers step by step. Both numbers share the same whole number part, which is 9. Therefore, the comparison hinges on the fractional parts. For 9.11, the fractional part is 0.11, and for 9.9, it is 0.9.

    Every model's answer to this prompt
  • 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.

    Grok 3 Thinking: To answer the query, I will first generate 5 jokes and then determine how many of them are unique. Here are the 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.

    Every model's answer to this prompt

Price and specs

Gemini 2.5 Flash Preview 05-20 (thinking) and Grok 3 Thinking compared across 7 shared prompts
SpecGemini 2.5 Flash Preview 05-20 (thinking)Grok 3 Thinking
Input price$0.15/M tokens—
Output price$3.5/M tokens—
Context window1.0M tokens128K tokens
Free API (OpenRouter)No—
ReleasedMay 2025Feb 2025
At 10M a month$1.50$1.50–not listed
1M10M100M1B10M tokens

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

Common questions

What is the difference between Gemini 2.5 Flash Preview 05-20 (thinking) and Grok 3 Thinking?

Gemini 2.5 Flash Preview 05-20 (thinking) is developed by Google AI while Grok 3 Thinking is developed by xAI. Gemini 2.5 Flash Preview 05-20 (thinking) has a 1.0M token context window vs Grok 3 Thinking's 128K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview 05-20 (thinking) or Grok 3 Thinking?

It depends on your use case. Gemini 2.5 Flash Preview 05-20 (thinking) and Grok 3 Thinking each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

How can I compare Gemini 2.5 Flash Preview 05-20 (thinking) and Grok 3 Thinking on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview 05-20 (thinking) and Grok 3 Thinking 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 2.5 Flash Preview 05-20 (thinking)12 outputs, specs and price
  • Grok 3 Thinking14 outputs, specs and price
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