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Google: Gemini 3 Flash Preview vs xAI: Grok 4.20

Last updated at: 2026-04-02

Metric Gemini 3 Flash Preview Gemini 3 Flash Preview medium Release: 2025-12-17 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 10.0 7.1
Rank #1 #40
Consistency 10.0 8.2
Tests Correct
Attempt pass rate 100.0% 66.7%
Flaky tests 0 4
Total Runs 51 51
Cost per result 0.972 7.358
Total Cost $0.166 $0.663
Input Price $0.500 / 1M $2.000 / 1M
Output Price $3.000 / 1M $6.000 / 1M
Output Tokens 1,640 1,494
Reasoning Tokens 48,270 97,078
Response Time (avg) 11.39s 9.50s
Response Time (max) 50.16s 29.87s
Response Time (total) 113.86s 161.54s

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Score vs Response Time (avg)

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.13s 305 3,490
Grok 4.20 8.2 7.9 83.3% 1 3.36s 280 8,476
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 50.16s 351 12,645
Grok 4.20 10.0 10.0 100.0% 0 17.40s 232 9,556
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.72s 279 5,333
Grok 4.20 10.0 10.0 100.0% 0 4.17s 180 5,333
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 21.12s 12 14,908
Grok 4.20 5.3 10.0 33.3% 0 27.03s 375 49,339
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.09s 111 1,285
Grok 4.20 5.8 2.8 66.7% 1 7.09s 47 4,252
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 6.10s 72 4,558
Grok 4.20 7.3 5.9 83.3% 1 4.42s 40 5,474
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.43s 276 4,921
Grok 4.20 6.4 7.7 55.6% 1 3.89s 143 8,028
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 10.55s 234 1,130
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620

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