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Google: Gemini 3.5 Flash vs xAI: Grok 4.3

Summary

Gemini 3.5 Flash vs Grok 4.3 benchmark comparison: Grok 4.3 leads on average score with 7.7 vs 7.0. Grok 4.3 has the lower benchmark cost at $0.614 vs $1.079. Gemini 3.5 Flash is faster at 9.93s vs 47.51s, with pass rates of 77.8% vs 71.4%.

Recommended model: Grok 4.3 - It has the best score here (7.7), while costing about 1.8x less than Gemini 3.5 Flash.

Last updated at: 2026-06-12

Metric Gemini 3.5 Flash Gemini 3.5 Flash none Release: 2026-05-19 Grok 4.3 Grok 4.3 medium Release: 2026-05-01
Score 7.0 7.7
Rank #66 #40
Reliability 10.0 10.0
Consistency 8.9 8.5
Tests Correct
Attempt pass rate 77.8% 71.4%
Flaky tests 3 4
Total Runs 63 63
Cost per result 7.190 4.724
Total Cost $1.079 $0.614
Input Price $1.500 / 1M $1.250 / 1M
Output Price $9.000 / 1M $2.500 / 1M
Total Input Tokens 13,843 44,472
Output Tokens 117,518 1,981
Reasoning Tokens 0 221,382
Response Time (avg) 9.93s 47.51s
Response Time (max) 64.36s 216.69s
Response Time (total) 178.68s 997.68s

Generation showcase

Hamster playing table tennis

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

#66 Gemini 3.5 Flash

none
Cost
$0.225
Time
125.5s
Tokens
25,004 tok

#40 xAI: Grok 4.3

medium
Cost
$0.009
Time
19.0s
Tokens
3,661 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 2.53s 492 5,101 0
Grok 4.3 10.0 10.0 100.0% 0 8.83s 2,010 88 8,207
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 8.8 7.8 88.9% 1 34.69s 8,122 75,927 0
Grok 4.3 5.9 7.7 44.4% 1 41.23s 8,340 1,028 31,226
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 3.0 10.0 0.0% 0 0ms 0 0 0
Grok 4.3 10.0 10.0 100.0% 0 63.99s 12,909 234 15,301
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 6.5 10.0 50.0% 0 8.10s 2,781 5,895 0
Grok 4.3 10.0 10.0 100.0% 0 18.97s 7,761 180 9,546
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 10.64s 633 17,910 0
Grok 4.3 5.3 7.2 44.4% 1 181.74s 1,764 14 111,300
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 3.46s 486 1,620 0
Grok 4.3 5.4 2.5 66.7% 1 24.70s 825 70 5,020
Instructions following 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 3.38s 615 3,928 0
Grok 4.3 9.8 10.0 100.0% 0 18.58s 1,362 57 8,713
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 3.13s 558 4,640 0
Grok 4.3 5.9 7.2 55.6% 1 22.52s 1,689 128 14,468
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 3.0 10.0 0.0% 0 0ms 0 0 0
Grok 4.3 10.0 10.0 100.0% 0 17.66s 7,263 168 4,615
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 2.8 1.6 33.3% 1 4.87s 156 2,497 0
Grok 4.3 3.0 10.0 0.0% 0 44.47s 549 14 12,986

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