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Gemini 3.1 Pro Preview (medium) vs GPT-6 Luna (medium)

Gemini 3.1 Pro Preview (medium) leads on average score with 8.4 vs 8.3. GPT-6 Luna (medium) has the lower benchmark cost at $0.047 vs $1.585. GPT-6 Luna (medium) is faster at 18.07s vs 22.71s, with pass rates of 89.9% vs 73.9%.

Last updated at: 2026-10-02

Compared models

Rank
#71
Total Output Tokens
102,691
Response Time (avg)
22.71s
Total Cost
$1.585
Rank
#79
Total Output Tokens
53,161
Response Time (avg)
18.07s
Total Cost
$0.047
Recommended model GPT-6 Luna (medium)

Its score stays close to the best score here (8.3 vs 8.4), while costing about 33.8x less than Gemini 3.1 Pro Preview (medium).

Detailed comparison

Metric Gemini 3.1 Pro Preview Gemini 3.1 Pro Preview medium Release: 2026-02-19 GPT-6 Luna GPT-6 Luna medium Release: 2026-09-23
Score 8.4 8.3
Rank #71 #79
Reliability 9.8 10.0
Consistency 9.6 8.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 89.9% 73.9%
Flaky tests 1 3
Total Runs 69 69
Cost per result 7.924 0.313
Total Cost $1.585 $0.047
Input Price $2.000 / 1M $0.100 / 1M
Output Price $12.000 / 1M $0.500 / 1M
Cache Read Price $0.200 / 1M $0.010 / 1M
Cache Write Price $0.375 / 1M $0.125 / 1M
Total Input Tokens 176,208 203,193
Output Tokens 6,093 5,751
Reasoning Tokens 96,598 47,410
Response Time (avg) 22.71s 18.07s
Response Time (max) 88.68s 66.44s
Response Time (total) 386.11s 415.53s
Parameters ~1.2T 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.

#71 Gemini 3.1 Pro Preview

medium
Cost
$0.115
Time
87.2s
Tokens
9,629 tok

#79 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 3.1 Pro Preview 7.9 9.9 66.7% 0 40.17s 8,124 435 41,247
GPT-6 Luna 6.6 4.6 77.8% 2 23.63s 7,302 438 10,222

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