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Google: Gemini 3.1 Flash Lite vs xAI: Grok 4.20

Summary

Gemini 3.1 Flash Lite vs Grok 4.20 benchmark comparison: Gemini 3.1 Flash Lite leads on average score with 6.1 vs 5.3. Gemini 3.1 Flash Lite has the lower benchmark cost at $0.013 vs $0.057. Grok 4.20 is faster at 1.11s vs 1.33s, with pass rates of 54.0% vs 33.3%.

Recommended model: Gemini 3.1 Flash Lite - It has the best score here (6.1), while costing about 4.4x less than Grok 4.20.

Last updated at: 2026-06-12

Metric Gemini 3.1 Flash Lite Gemini 3.1 Flash Lite minimal Release: 2026-05-08 Grok 4.20 Grok 4.20 none Release: 2026-03-31
Score 6.1 5.3
Rank #95 #130
Reliability 10.0 N/A
Consistency 8.8 10.0
Tests Correct
Attempt pass rate 54.0% 33.3%
Flaky tests 3 0
Total Runs 63 54
Cost per result 0.130 1.570
Total Cost $0.013 $0.057
Input Price $0.250 / 1M $1.250 / 1M
Output Price $1.500 / 1M $2.500 / 1M
Total Input Tokens 36,973 41,313
Output Tokens 2,487 1,923
Reasoning Tokens 0 0
Response Time (avg) 1.33s 1.11s
Response Time (max) 4.49s 6.04s
Response Time (total) 27.91s 19.96s

Generation showcase

Hamster playing table tennis

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

#95 Gemini 3.1 Flash Lite

minimal
Cost
$0.001
Time
3.7s
Tokens
635 tok

#130 xAI: Grok 4.20

none
Cost
$0.004
Time
6.5s
Tokens
1,367 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 3.1 Flash Lite 8.3 10.0 75.0% 0 1.10s 500 639 0
Grok 4.20 4.8 10.0 25.0% 0 501ms 1,986 267 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite 5.5 10.0 33.3% 0 831ms 8,126 666 0
Grok 4.20 3.4 9.3 0.0% 0 1.22s 1,074 312 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite 3.0 10.0 0.0% 0 2.53s 12,870 357 0
Grok 4.20 3.0 10.0 0.0% 0 6.04s 17,673 282 0
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 10.0 10.0 100.0% 0 1.04s 7,552 279 0
Grok 4.20 10.0 10.0 100.0% 0 522ms 7,749 207 0
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 2.9 7.2 11.1% 1 1.02s 641 15 0
Grok 4.20 3.0 10.0 0.0% 0 687ms 1,746 325 0
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 4.0 10.0 0.0% 0 791ms 490 63 0
Grok 4.20 4.8 10.0 0.0% 0 659ms 819 83 0
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 10.0 10.0 100.0% 0 932ms 615 72 0
Grok 4.20 6.3 10.0 50.0% 0 445ms 1,350 60 0
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 6.0 4.6 66.7% 2 2.15s 564 153 0
Grok 4.20 5.3 10.0 33.3% 0 473ms 1,671 198 0
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 10.0 10.0 100.0% 0 3.51s 5,457 234 0
Grok 4.20 10.0 10.0 100.0% 0 4.63s 7,245 189 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite 3.0 10.0 0.0% 0 724ms 158 9 0
Grok 4.20 - - - - - - - - -

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