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Gemini 3.8 Flash (medium) vs GPT-6 Luna (medium)

GPT-6 Luna (medium) leads on average score with 8.3 vs 8.0. GPT-6 Luna (medium) has the lower benchmark cost at $0.047 vs $0.769. Gemini 3.8 Flash (medium) is faster at 16.64s vs 18.07s, with pass rates of 89.9% vs 73.9%.

Last updated at: 2026-10-17

Compared models

Rank
#111
Total Output Tokens
167,486
Response Time (avg)
16.64s
Total Cost
$0.769
Rank
#94
Total Output Tokens
53,161
Response Time (avg)
18.07s
Total Cost
$0.047
Recommended model GPT-6 Luna (medium)

It has the best score here (8.3), while costing about 16.4x less than Gemini 3.8 Flash (medium).

Detailed comparison

Metric Gemini 3.8 Flash Gemini 3.8 Flash medium Release: 2026-09-02 GPT-6 Luna GPT-6 Luna medium Release: 2026-09-23
Score 8.0 8.3
Rank #111 #94
Reliability 9.9 10.0
Consistency 9.0 8.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 89.9% 73.9%
Flaky tests 3 3
Total Runs 69 69
Cost per result 4.046 0.313
Total Cost $0.769 $0.047
Input Price $0.750 / 1M $0.100 / 1M
Output Price $3.750 / 1M $0.500 / 1M
Cache Read Price $0.075 / 1M $0.010 / 1M
Cache Write Price $0.042 / 1M $0.125 / 1M
Total Input Tokens 187,331 203,193
Output Tokens 7,555 5,751
Reasoning Tokens 159,931 47,410
Response Time (avg) 16.64s 18.07s
Response Time (max) 108.60s 66.44s
Response Time (total) 382.64s 415.53s
Parameters ~500B total (~20B active) ~400B total (~17B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#111 Gemini 3.8 Flash

medium
Cost
$0.037
Time
54.6s
Tokens
9,712 tok

#94 GPT-6 Luna

medium
Cost
$0.002
Time
23.6s
Tokens
2,966 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 8.0 9.9 66.7% 0 11.69s 8,118 454 19,433
GPT-6 Luna 6.6 4.6 77.8% 2 23.63s 7,302 438 10,222

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