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  5. Gemini 2.5 Flash Preview 05-20vsGrok 4
Updated Jul 2025

Gemini 2.5 Flash Preview 05-20vsGrok 4

Gemini 2.5 Flash Preview 05-20 is cheaper than Grok 4 at $0.15/M vs $3/M input tokens.

Gemini 2.5 Flash Preview 05-20 and Grok 4 compared across 11 shared prompts
SpecGemini 2.5 Flash Preview 05-20Grok 4
Input price$0.15/M tokens$3/M tokens
Output price$0.6/M tokens$15/M tokens
Context window1.0M tokens256K tokens
ParametersNot disclosedNot disclosed
Free API (OpenRouter)NoNo
ReleasedMay 2025Jul 2025
Side by side

Same prompt, both answers

Opening lines from 2 of the 11 prompts both answered. Formatting stripped, words untouched.

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

Gemini 2.5 Flash Preview 05-20569 words
Alright, alright, settle down you magnificent collection of human beings! You look good tonight. Not just good, but… like you've all collectively decided to nail the 'I'm here to laugh and avoid talking about my Monday' look. And I respect that. Seriously though, it's great to be back on stage. I'm living the dream.
Read the full answer
Grok 4461 words
Below is a 3-minute stand-up comedy routine I've written. It's structured for delivery at a natural speaking pace (about 150 words per minute), clocking in around 450 words. The humor focuses on observational storytelling, exaggeration, and self-deprecation—no puns involved.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Gemini 2.5 Flash Preview 05-2079 words
Here are 5 jokes for you: 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.
Read the full answer
Grok 4113 words
Below, I'll follow your instructions step by step. First, I'll generate 5 jokes (numbered for clarity). Then, I'll answer the question: "How many are unique?" Generated Jokes: Why did the scarecrow win an award? Because he was outstanding in his field! Why did the scarecrow win an award?
Read the full answer
Our Verdict
Grok 4
Grok 4
Gemini 2.5 Flash Preview 05-20
Gemini 2.5 Flash Preview 05-20Runner-up

Not enough votes to call it. On the specs, Grok 4 has the edge: bigger model tier, newer.

Gemini 2.5 Flash Preview 05-20 costs 25x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview 05-20
Input
$0.15
20× cheaper
Output
$0.60
25× cheaper
Grok 4
Input
$3.00
Output
$15.00

Gemini 2.5 Flash Preview 05-20 is cheaper on both: 20× input, 25× output.

Writing DNA

Style Comparison

Similarity
50%

Grok 4 uses 59.8x more emoji

Gemini 2.5 Flash Preview 05-20
Grok 4
69%Vocabulary56%
10wSentence Length18w
0.26Hedging0.65
1.1Bold2.4
5.5Lists2.4
0.00Emoji0.60
0.00Headings0.73
0.00Transitions0.06
Based on 2 + 26 text responses
Research

What we learned reading every model

FAQ

Common questions

Gemini 2.5 Flash Preview 05-20 is developed by Google AI while Grok 4 is developed by xAI. Gemini 2.5 Flash Preview 05-20 has a 1.0M token context window vs Grok 4's 256K. You can compare their actual outputs across 11 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 2.5 Flash Preview 05-20 and Grok 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 11 challenges so you can judge which fits your needs best.

Gemini 2.5 Flash Preview 05-20 costs $0.15/M input tokens and Grok 4 costs $3/M input tokens. Gemini 2.5 Flash Preview 05-20 is $2.85/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 2.5 Flash Preview 05-20 and Grok 4 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 logo
Gemini 2.5 Flash Preview 05-2011 outputs, specs and price
Grok 4 logo
Grok 457 outputs, specs and price
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