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

Summary

Gemini 3.1 Flash Lite (medium) vs GPT-5.6 Luna (high) benchmark comparison: Gemini 3.1 Flash Lite (medium) leads on average score with 7.8 vs 7.7. Gemini 3.1 Flash Lite (medium) has the lower benchmark cost at $0.071 vs $0.924. Gemini 3.1 Flash Lite (medium) is faster at 3.23s vs 18.39s, with pass rates of 65.1% vs 71.4%.

Recommended model: Gemini 3.1 Flash Lite (medium) - It has the best score here (7.8), while costing about 13.2x less than GPT-5.6 Luna (high).

Last updated at: 2026-07-09

Metric Gemini 3.1 Flash Lite Gemini 3.1 Flash Lite medium Release: 2026-05-08 GPT-5.6 Luna GPT-5.6 Luna high Release: 2026-07-09
Score 7.8 7.7
Rank #42 #50
Reliability 10.0 10.0
Consistency 9.2 8.8
Tests Correct
Attempt pass rate 65.1% 71.4%
Flaky tests 2 3
Total Runs 63 63
Cost per result 0.539 6.594
Total Cost $0.071 $0.924
Input Price $0.250 / 1M $1.000 / 1M
Output Price $1.500 / 1M $6.000 / 1M
Total Input Tokens 36,808 35,699
Output Tokens 2,254 2,079
Reasoning Tokens 38,300 145,816
Response Time (avg) 3.23s 18.39s
Response Time (max) 10.87s 111.09s
Response Time (total) 67.80s 386.24s

Generation showcase

Hamster playing table tennis

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

#42 Gemini 3.1 Flash Lite

medium
Cost
$0.003
Time
5.3s
Tokens
1,754 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 9.1 10.0 75.0% 0 2.39s 502 604 4,201
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 5.5 10.0 33.3% 0 3.81s 8,134 459 8,978
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 10.0 10.0 100.0% 0 10.87s 12,873 327 7,401
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 10.0 10.0 100.0% 0 2.60s 7,362 279 2,845
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 2.9 7.2 11.1% 1 3.16s 643 15 5,165
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 10.0 10.0 100.0% 0 2.60s 488 84 1,142
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 9.9 10.0 100.0% 0 2.59s 623 75 3,320
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 7.6 7.2 77.8% 1 1.95s 568 165 2,450
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 10.0 10.0 100.0% 0 4.55s 5,457 234 921
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 3.0 10.0 0.0% 0 3.08s 158 12 1,877
GPT-5.6 Luna 3.0 10.0 0.0% 0 17.00s 195 31 7,380

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