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

Summary

Gemini 3.1 Flash Lite Preview (medium) vs GPT-5.6 Luna (high) benchmark comparison: Gemini 3.1 Flash Lite Preview (medium) leads on average score with 7.8 vs 7.7. Gemini 3.1 Flash Lite Preview (medium) has the lower benchmark cost at $0.068 vs $0.924. Gemini 3.1 Flash Lite Preview (medium) is faster at 3.96s vs 18.39s, with pass rates of 61.9% vs 71.4%.

Recommended model: Gemini 3.1 Flash Lite Preview (medium) - It has the best score here (7.8), while costing about 13.6x less than GPT-5.6 Luna (high).

Last updated at: 2026-07-09

Metric Gemini 3.1 Flash Lite Preview Gemini 3.1 Flash Lite Preview medium Release: 2026-03-03 GPT-5.6 Luna GPT-5.6 Luna high Release: 2026-07-09
Score 7.8 7.7
Rank #40 #50
Reliability 10.0 10.0
Consistency 10.0 8.8
Tests Correct
Attempt pass rate 61.9% 71.4%
Flaky tests 0 3
Total Runs 63 63
Cost per result 0.523 6.594
Total Cost $0.068 $0.924
Input Price $0.250 / 1M $1.000 / 1M
Output Price $1.500 / 1M $6.000 / 1M
Total Input Tokens 37,786 35,699
Output Tokens 2,210 2,079
Reasoning Tokens 36,744 145,816
Response Time (avg) 3.96s 18.39s
Response Time (max) 14.93s 111.09s
Response Time (total) 83.06s 386.24s

Generation showcase

Hamster playing table tennis

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

#40 Gemini 3.1 Flash Lite Preview

medium
Cost
$0.003
Time
5.2s
Tokens
1,944 tok

#50 GPT-5.6 Luna

high
Cost
$0.033
Time
34.2s
Tokens
5,484 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 Preview 9.1 10.0 75.0% 0 2.33s 512 570 4,305
GPT-5.6 Luna 8.3 10.0 75.0% 0 2.99s 606 162 1,265
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 5.5 10.0 33.3% 0 4.09s 8,126 461 8,597
GPT-5.6 Luna 5.5 4.7 55.6% 2 15.63s 7,302 510 17,746
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 10.0 10.0 100.0% 0 14.93s 13,403 327 7,347
GPT-5.6 Luna 10.0 10.0 100.0% 0 13.29s 12,500 357 2,911
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 Preview 10.0 10.0 100.0% 0 2.29s 7,362 279 2,952
GPT-5.6 Luna 10.0 10.0 100.0% 0 2.18s 7,140 234 470
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 Preview 3.0 10.0 0.0% 0 4.21s 639 18 5,325
GPT-5.6 Luna 7.7 10.0 66.7% 0 78.96s 723 69 96,395
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 Preview 10.0 10.0 100.0% 0 3.16s 488 96 1,488
GPT-5.6 Luna 5.0 10.0 0.0% 0 3.65s 477 117 563
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 Preview 10.0 10.0 100.0% 0 1.91s 621 72 2,121
GPT-5.6 Luna 9.9 10.0 100.0% 0 1.79s 660 97 481
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 Preview 7.7 10.0 66.7% 0 5.30s 566 141 1,896
GPT-5.6 Luna 7.6 7.2 77.8% 1 14.55s 642 242 18,281
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 Preview 10.0 10.0 100.0% 0 3.80s 5,909 234 912
GPT-5.6 Luna 10.0 10.0 100.0% 0 4.98s 5,454 260 324
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Flash Lite Preview 3.0 10.0 0.0% 0 2.68s 160 12 1,801
GPT-5.6 Luna 3.0 10.0 0.0% 0 17.00s 195 31 7,380

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