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Google: Gemini 3.1 Flash Lite Preview vs xAI: Grok 4.20

Last updated at: 2026-06-04

Metric Gemini 3.1 Flash Lite Preview Gemini 3.1 Flash Lite Preview none Release: 2026-03-03 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.2 7.1
Rank #58 #65
Reliability 10.0 10.0
Consistency 9.7 8.8
Tests Correct
Attempt pass rate 60.3% 63.5%
Flaky tests 1 3
Total Runs 63 63
Cost per result 0.148 8.309
Total Cost $0.018 $0.609
Input Price $0.250 / 1M $1.250 / 1M
Output Price $1.500 / 1M $2.500 / 1M
Total Input Tokens 37,582 44,433
Output Tokens 5,547 1,819
Reasoning Tokens 0 219,524
Response Time (avg) 1.21s 27.68s
Response Time (max) 3.39s 199.66s
Response Time (total) 25.45s 581.26s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 7.5 8.4 66.7% 1 1.04s 504 1,092 0
Grok 4.20 8.2 7.9 83.3% 1 3.95s 2,010 287 8,312
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 5.5 10.0 33.3% 0 967ms 8,128 670 0
Grok 4.20 6.3 6.6 55.6% 1 109.93s 8,307 268 103,150
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 3.0 10.0 0.0% 0 3.20s 13,026 339 0
Grok 4.20 10.0 10.0 100.0% 0 17.40s 12,909 232 9,556
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 1.22s 7,550 399 0
Grok 4.20 10.0 10.0 100.0% 0 4.17s 7,761 180 5,333
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 5.3 10.0 33.3% 0 942ms 641 568 0
Grok 4.20 5.3 10.0 33.3% 0 27.03s 1,764 375 49,339
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 4.0 10.0 0.0% 0 741ms 488 69 0
Grok 4.20 3.9 2.6 33.3% 1 24.48s 825 65 6,440
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 1.13s 623 574 0
Grok 4.20 9.8 10.0 100.0% 0 4.26s 1,362 57 6,419
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 900ms 570 1,045 0
Grok 4.20 7.7 10.0 66.7% 0 6.22s 1,689 149 7,913
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 3.39s 5,894 782 0
Grok 4.20 3.0 10.0 0.0% 0 13.68s 7,275 197 6,620
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 3.0 10.0 0.0% 0 814ms 158 9 0
Grok 4.20 3.0 10.0 0.0% 0 63.48s 531 9 16,442

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