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Gemini 3.8 Flash (low) vs GPT-5.6 Luna (medium)

The average score is effectively tied at 7.5 vs 7.4. GPT-5.6 Luna (medium) has the lower benchmark cost at $0.072 vs $0.239. Gemini 3.8 Flash (low) is faster at 4.83s vs 7.43s, with pass rates of 81.8% vs 62.1%.

Last updated at: 2026-09-02

Rank
#99
Total Output Tokens
41,324
Response Time (avg)
4.83s
Total Cost
$0.239
Rank
#103
Total Output Tokens
44,525
Response Time (avg)
7.43s
Total Cost
$0.072
Recommended model GPT-5.6 Luna (medium)

It has the best score here (7.4), while costing about 3.3x less than Gemini 3.8 Flash (low).

Detailed comparison

Metric Gemini 3.8 Flash Gemini 3.8 Flash low Release: 2026-09-02 GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09
Score 7.5 7.4
Rank #99 #103
Reliability 10.0 10.0
Consistency 8.5 9.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 81.8% 62.1%
Flaky tests 4 2
Total Runs 66 66
Cost per result 1.493 2.601
Total Cost $0.239 $0.072
Input Price $0.750 / 1M $0.200 / 1M
Output Price $3.750 / 1M $1.200 / 1M
Total Input Tokens 111,773 89,685
Output Tokens 8,035 5,701
Reasoning Tokens 33,289 38,824
Response Time (avg) 4.83s 7.43s
Response Time (max) 35.14s 29.85s
Response Time (total) 106.18s 163.54s
Parameters ~500B total (~20B active) ~400B total (~17B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#99 Gemini 3.8 Flash

low
Cost
$0.030
Time
45.8s
Tokens
8,023 tok

#103 GPT-5.6 Luna

medium
Cost
$0.014
Time
14.6s
Tokens
2,362 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

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.8 Flash 5.4 7.2 44.4% 1 4.31s 8,118 449 5,706
GPT-5.6 Luna 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928

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