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Google: Gemini 3.1 Flash Lite vs OpenAI: GPT-5.6 Luna

Summary

Gemini 3.1 Flash Lite (low) vs GPT-5.6 Luna (low) benchmark comparison: Gemini 3.1 Flash Lite (low) leads on average score with 6.4 vs 6.2. Gemini 3.1 Flash Lite (low) has the lower benchmark cost at $0.028 vs $0.141. Gemini 3.1 Flash Lite (low) is faster at 1.89s vs 4.35s, with pass rates of 61.9% vs 57.1%.

Recommended model: Gemini 3.1 Flash Lite (low) - It has the best score here (6.4), while costing about 5.2x less than GPT-5.6 Luna (low).

Last updated at: 2026-07-09

Metric Gemini 3.1 Flash Lite Gemini 3.1 Flash Lite low Release: 2026-05-08 GPT-5.6 Luna GPT-5.6 Luna low Release: 2026-07-09
Score 6.4 6.2
Rank #98 #107
Reliability 10.0 10.0
Consistency 9.3 8.5
Tests Correct
Attempt pass rate 61.9% 57.1%
Flaky tests 2 4
Total Runs 63 63
Cost per result 0.227 1.404
Total Cost $0.028 $0.141
Input Price $0.250 / 1M $1.000 / 1M
Output Price $1.500 / 1M $6.000 / 1M
Total Input Tokens 36,892 34,218
Output Tokens 2,732 2,110
Reasoning Tokens 9,260 15,571
Response Time (avg) 1.89s 4.35s
Response Time (max) 5.66s 18.06s
Response Time (total) 39.62s 91.45s

Generation showcase

Hamster playing table tennis

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

#98 Gemini 3.1 Flash Lite

low
Cost
$0.003
Time
4.0s
Tokens
1,479 tok

#107 GPT-5.6 Luna

low
Cost
$0.011
Time
10.2s
Tokens
1,897 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 7.3 6.2 75.0% 2 1.84s 500 1,013 1,548
GPT-5.6 Luna 8.3 10.0 75.0% 0 2.21s 606 186 722
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 1.53s 8,132 471 1,072
GPT-5.6 Luna 5.5 10.0 33.3% 0 4.61s 7,302 557 3,535
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 4.48s 12,870 348 975
GPT-5.6 Luna 2.8 1.6 33.3% 1 7.99s 11,019 300 1,060
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 1.44s 7,453 291 697
GPT-5.6 Luna 10.0 10.0 100.0% 0 2.14s 7,140 234 292
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 5.3 10.0 33.3% 0 1.52s 639 15 1,214
GPT-5.6 Luna 3.6 7.2 22.2% 1 10.05s 723 70 6,718
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 1.37s 492 69 438
GPT-5.6 Luna 5.0 10.0 0.0% 0 2.25s 477 122 169
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 1.52s 619 72 760
GPT-5.6 Luna 8.5 6.8 83.3% 1 2.04s 660 93 259
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 10.0 10.0 100.0% 0 1.40s 570 210 1,191
GPT-5.6 Luna 7.6 7.2 77.8% 1 3.59s 642 271 1,207
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 5.66s 5,457 234 945
GPT-5.6 Luna 10.0 10.0 100.0% 0 4.43s 5,454 250 177
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 1.46s 160 9 420
GPT-5.6 Luna 3.0 10.0 0.0% 0 4.86s 195 27 1,432

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