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Gemini 2.5 Flash vs GPT-6 Luna

The average score is effectively tied at 5.5 vs 5.5. Gemini 2.5 Flash has the lower benchmark cost at $0.017 vs $0.026. Gemini 2.5 Flash is faster at 6.00s vs 20.48s, with pass rates of 37.7% vs 40.6%.

Last updated at: 2026-10-15

Compared models

Rank
#297
Total Output Tokens
1,890
Response Time (avg)
6.00s
Total Cost
$0.017
Rank
#298
Total Output Tokens
6,855
Response Time (avg)
20.48s
Total Cost
$0.026
Recommended model Gemini 2.5 Flash

It has the best score here (5.5), while costing about 1.5x less than GPT-6 Luna.

Detailed comparison

Metric Gemini 2.5 Flash Gemini 2.5 Flash none Release: 2025-06-17 GPT-6 Luna GPT-6 Luna none Release: 2026-09-23
Score 5.5 5.5
Rank #297 #298
Reliability 10.0 9.9
Consistency 9.6 8.2
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 37.7% 40.6%
Flaky tests 1 5
Total Runs 69 69
Cost per result 0.209 0.367
Total Cost $0.017 $0.026
Input Price $0.300 / 1M $0.100 / 1M
Output Price $2.500 / 1M $0.500 / 1M
Cache Read Price $0.030 / 1M $0.010 / 1M
Cache Write Price $0.084 / 1M $0.125 / 1M
Total Input Tokens 39,886 222,357
Output Tokens 1,890 6,855
Reasoning Tokens 0 0
Response Time (avg) 6.00s 20.48s
Response Time (max) 118.00s 98.62s
Response Time (total) 138.04s 470.96s
Parameters ~350B 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.

#297 Gemini 2.5 Flash

none
Invalid SVG
Cost
$0.164
Time
215.5s
Tokens
65,659 tok

#298 GPT-6 Luna

none
Cost
$0.002
Time
26.0s
Tokens
3,235 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 2.5 Flash 5.5 10.0 33.3% 0 736ms 8,122 483 0
GPT-6 Luna 5.5 10.0 33.3% 0 8.04s 7,302 376 0

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