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Google: Gemini 3.5 Flash vs xAI: Grok 4.5

Summary

Gemini 3.5 Flash (high) vs Grok 4.5 (medium) benchmark comparison: Gemini 3.5 Flash (high) leads on average score with 9.8 vs 8.3. Gemini 3.5 Flash (high) has the lower benchmark cost at $1.115 vs $1.696. Gemini 3.5 Flash (high) is faster at 8.84s vs 62.63s, with pass rates of 96.8% vs 77.8%.

Recommended model: Gemini 3.5 Flash (high) - It has the best score here (9.8), while costing about 1.5x less than Grok 4.5 (medium).

Last updated at: 2026-07-08

Metric Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19 Grok 4.5 Grok 4.5 medium Release: 2026-07-08
Score 9.8 8.3
Rank #1 #23
Reliability 10.0 9.9
Consistency 9.6 8.9
Tests Correct
Attempt pass rate 96.8% 77.8%
Flaky tests 1 3
Total Runs 63 63
Cost per result 5.575 11.304
Total Cost $1.115 $1.696
Input Price $1.500 / 1M $2.000 / 1M
Output Price $9.000 / 1M $6.000 / 1M
Total Input Tokens 37,594 53,500
Output Tokens 1,975 1,621
Reasoning Tokens 115,638 263,127
Response Time (avg) 8.84s 62.63s
Response Time (max) 34.82s 436.38s
Response Time (total) 185.57s 1315.20s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#1 Gemini 3.5 Flash

high
Cost
$0.208
Time
118.2s
Tokens
23,158 tok

#23 xAI: Grok 4.5

medium
Cost
$0.044
Time
59.4s
Tokens
7,512 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.57s 492 174 4,997
Grok 4.5 10.0 10.0 100.0% 0 23.50s 2,991 147 4,018
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.96s 8,118 456 47,129
Grok 4.5 7.6 7.2 77.8% 1 155.69s 9,579 390 104,634
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.37s 12,873 351 16,323
Grok 4.5 10.0 10.0 100.0% 0 15.65s 15,084 261 4,254
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 6.43s 7,548 279 8,466
Grok 4.5 10.0 10.0 100.0% 0 6.29s 8,937 225 3,657
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 7.6 7.2 77.8% 1 14.09s 633 12 24,721
Grok 4.5 2.9 7.2 11.1% 1 198.89s 2,212 11 121,922
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.63s 486 115 1,650
Grok 4.5 6.5 3.4 66.7% 1 12.84s 1,077 71 2,384
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.35s 615 70 3,799
Grok 4.5 9.8 10.0 100.0% 0 6.06s 1,857 57 2,728
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.23s 558 241 4,940
Grok 4.5 10.0 10.0 100.0% 0 7.75s 2,430 254 3,641
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 9.8 10.0 100.0% 0 4.96s 6,115 265 1,608
Grok 4.5 10.0 10.0 100.0% 0 6.57s 8,544 192 968
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.94s 156 12 2,005
Grok 4.5 3.0 10.0 0.0% 0 74.44s 789 13 14,921

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