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Google: Gemini 3 Flash Preview vs xAI: Grok 4.3

Summary

Gemini 3 Flash Preview vs Grok 4.3 benchmark comparison: Grok 4.3 leads on average score with 7.7 vs 6.9. Gemini 3 Flash Preview has the lower benchmark cost at $0.025 vs $0.614. Gemini 3 Flash Preview is faster at 1.65s vs 47.51s, with pass rates of 66.7% vs 71.4%.

Recommended model: Gemini 3 Flash Preview - It offers the best overall trade-off: a competitive score (6.9), lower cost than Grok 4.3, and balanced response time.

Last updated at: 2026-06-12

Metric Gemini 3 Flash Preview Gemini 3 Flash Preview none Release: 2025-12-17 Grok 4.3 Grok 4.3 medium Release: 2026-05-01
Score 6.9 7.7
Rank #68 #40
Reliability 10.0 10.0
Consistency 9.2 8.5
Tests Correct
Attempt pass rate 66.7% 71.4%
Flaky tests 2 4
Total Runs 63 63
Cost per result 0.186 4.724
Total Cost $0.025 $0.614
Input Price $0.500 / 1M $1.250 / 1M
Output Price $3.000 / 1M $2.500 / 1M
Total Input Tokens 37,011 44,472
Output Tokens 1,885 1,981
Reasoning Tokens 0 221,382
Response Time (avg) 1.65s 47.51s
Response Time (max) 3.56s 216.69s
Response Time (total) 23.07s 997.68s

Generation showcase

Hamster playing table tennis

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

#68 Gemini 3 Flash Preview

none
Cost
$0.003
Time
5.6s
Tokens
981 tok

#40 xAI: Grok 4.3

medium
Cost
$0.009
Time
19.0s
Tokens
3,661 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 8.3 10.0 75.0% 0 1.25s 498 214 0
Grok 4.3 10.0 10.0 100.0% 0 8.83s 2,010 88 8,207
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 5.5 10.0 33.3% 0 1.80s 8,122 453 0
Grok 4.3 5.9 7.7 44.4% 1 41.23s 8,340 1,028 31,226
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 4.7 1.6 66.7% 1 3.56s 12,862 350 0
Grok 4.3 10.0 10.0 100.0% 0 63.99s 12,909 234 15,301
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 1.41s 7,263 279 0
Grok 4.3 10.0 10.0 100.0% 0 18.97s 7,761 180 9,546
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 7.7 10.0 66.7% 0 963ms 643 18 0
Grok 4.3 5.3 7.2 44.4% 1 181.74s 1,764 14 111,300
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 1.13s 490 104 0
Grok 4.3 5.4 2.5 66.7% 1 24.70s 825 70 5,020
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 6.4 5.8 66.7% 1 1.58s 619 74 0
Grok 4.3 9.8 10.0 100.0% 0 18.58s 1,362 57 8,713
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 7.7 10.0 66.7% 0 1.05s 574 144 0
Grok 4.3 5.9 7.2 55.6% 1 22.52s 1,689 128 14,468
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 3.35s 5,784 234 0
Grok 4.3 10.0 10.0 100.0% 0 17.66s 7,263 168 4,615
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 3.0 10.0 0.0% 0 1.07s 156 15 0
Grok 4.3 3.0 10.0 0.0% 0 44.47s 549 14 12,986

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