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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 none Release: 2025-12-17 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 8.0 7.1
Rank #21 #40
Consistency 9.0 8.2
Tests Correct
Attempt pass rate 76.5% 66.7%
Flaky tests 2 4
Total Runs 51 51
Cost per result 0.156 7.358
Total Cost $0.019 $0.663
Input Price $0.500 / 1M $2.000 / 1M
Output Price $3.000 / 1M $6.000 / 1M
Output Tokens 1,417 1,494
Reasoning Tokens 0 97,078
Response Time (avg) 1.66s 9.50s
Response Time (max) 3.56s 29.87s
Response Time (total) 16.61s 161.54s

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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 8.3 10.0 75.0% 0 1.25s 214 0
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 4.7 1.6 66.7% 1 3.56s 350 0
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 1.41s 279 0
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 7.7 10.0 66.7% 0 963ms 18 0
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 1.13s 104 0
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 6.4 5.8 66.7% 1 1.58s 74 0
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 7.7 10.0 66.7% 0 1.06s 144 0
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 3.35s 234 0
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620

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