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Google: Gemini 3 Flash Preview vs Grok 4.1 Fast

Summary

Gemini 3 Flash Preview vs Grok 4.1 Fast benchmark comparison: Gemini 3 Flash Preview leads on average score with 9.6 vs 5.6. Grok 4.1 Fast has the lower benchmark cost at $0.069 vs $0.667. Gemini 3 Flash Preview is faster at 18.64s vs 23.85s, with pass rates of 98.4% vs 55.6%.

Recommended model: Gemini 3 Flash Preview - It has the strongest score in this comparison (9.6) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-02

Metric Gemini 3 Flash Preview Gemini 3 Flash Preview medium Release: 2025-12-17 Grok 4.1 Fast Grok 4.1 Fast medium Release: 2025-11-19
Score 9.6 5.6
Rank #2 #119
Reliability 10.0 10.0
Consistency 9.7 6.6
Tests Correct
Attempt pass rate 98.4% 55.6%
Flaky tests 1 6
Total Runs 63 57
Cost per result 3.335 0.642
Total Cost $0.667 $0.069
Input Price $0.500 / 1M $0.484 / 1M
Output Price $3.000 / 1M $0.484 / 1M
Total Input Tokens 37,017 42,845
Output Tokens 2,006 2,006
Reasoning Tokens 214,153 96,334
Response Time (avg) 18.64s 23.85s
Response Time (max) 117.26s 121.79s
Response Time (total) 391.35s 286.16s

Generation showcase

Hamster playing table tennis

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

#2 Gemini 3 Flash Preview

medium
Cost
$0.010
Time
17.9s
Tokens
3,236 tok

#119 Grok 4.1 Fast

medium
Grok 4.1 Fast is deprecated. xAI recommends switching to Grok 4.3 (https://openrouter.ai/x-ai/grok-4.3)
Cost
$0.000
Time
0.1s
Tokens
0 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 Flash Preview 10.0 10.0 100.0% 0 3.88s 494 330 3,216
Grok 4.1 Fast 8.7 7.9 91.7% 1 3.81s 2,358 108 4,741
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 8.6 7.6 88.9% 1 84.40s 8,122 462 161,084
Grok 4.1 Fast 7.8 4.0 11.1% 1 23.58s 1,167 821 6,703
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 22.42s 12,873 351 10,485
Grok 4.1 Fast 10.0 10.0 100.0% 0 37.64s 13,899 261 12,272
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.43s 7,548 279 4,893
Grok 4.1 Fast 10.0 10.0 100.0% 0 6.63s 8,001 180 5,409
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 15.27s 633 12 21,684
Grok 4.1 Fast 5.8 4.4 66.7% 2 121.79s 1,777 11 37,657
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.19s 486 72 1,905
Grok 4.1 Fast 4.2 9.9 0.0% 0 16.25s 912 127 3,456
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.04s 615 72 2,709
Grok 4.1 Fast 6.5 10.0 50.0% 0 4.63s 1,536 54 3,326
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.05s 558 183 4,365
Grok 4.1 Fast 5.3 7.2 44.4% 1 7.40s 1,950 169 5,904
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 12.60s 5,532 234 1,487
Grok 4.1 Fast 2.8 1.6 33.3% 1 27.71s 10,627 260 11,485
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.50s 156 11 2,325
Grok 4.1 Fast 3.0 10.0 0.0% 0 25.52s 618 15 5,381

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