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

Summary

Gemini 3.1 Flash Lite (minimal) vs GPT-5.6 Luna (low) benchmark comparison: GPT-5.6 Luna (low) leads on average score with 6.2 vs 6.1. Gemini 3.1 Flash Lite (minimal) has the lower benchmark cost at $0.013 vs $0.141. Gemini 3.1 Flash Lite (minimal) is faster at 1.33s vs 4.35s, with pass rates of 54.0% vs 57.1%.

Recommended model: Gemini 3.1 Flash Lite (minimal) - Its score stays close to the best score here (6.1 vs 6.2), while costing about 10.8x less than GPT-5.6 Luna (low).

Last updated at: 2026-07-09

Metric Gemini 3.1 Flash Lite Gemini 3.1 Flash Lite minimal Release: 2026-05-08 GPT-5.6 Luna GPT-5.6 Luna low Release: 2026-07-09
Score 6.1 6.2
Rank #109 #107
Reliability 10.0 10.0
Consistency 8.8 8.5
Tests Correct
Attempt pass rate 54.0% 57.1%
Flaky tests 3 4
Total Runs 63 63
Cost per result 0.130 1.404
Total Cost $0.013 $0.141
Input Price $0.250 / 1M $1.000 / 1M
Output Price $1.500 / 1M $6.000 / 1M
Total Input Tokens 36,973 34,218
Output Tokens 2,487 2,110
Reasoning Tokens 0 15,571
Response Time (avg) 1.33s 4.35s
Response Time (max) 4.49s 18.06s
Response Time (total) 27.91s 91.45s

Generation showcase

Hamster playing table tennis

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

#109 Gemini 3.1 Flash Lite

minimal
Cost
$0.001
Time
3.7s
Tokens
635 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 8.3 10.0 75.0% 0 1.10s 500 639 0
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 831ms 8,126 666 0
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 2.53s 12,870 357 0
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 1.04s 7,552 279 0
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 2.9 7.2 11.1% 1 1.02s 641 15 0
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 791ms 490 63 0
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 932ms 615 72 0
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 6.0 4.6 66.7% 2 2.15s 564 153 0
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 3.51s 5,457 234 0
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 724ms 158 9 0
GPT-5.6 Luna 3.0 10.0 0.0% 0 4.86s 195 27 1,432

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