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GPT-6 Luna (medium) vs Step 3.7 Flash (medium)

The average score is effectively tied at 7.9 vs 7.9. GPT-6 Luna (medium) has the lower benchmark cost at $0.031 vs $0.495. GPT-6 Luna (medium) is faster at 15.87s vs 23.51s, with pass rates of 72.7% vs 68.2%.

Last updated at: 2026-09-23

Compared models

Rank
#94
Total Output Tokens
45,154
Response Time (avg)
15.87s
Total Cost
$0.031
Rank
#92
Total Output Tokens
409,709
Response Time (avg)
23.51s
Total Cost
$0.495
Recommended model GPT-6 Luna (medium)

It has the best score here (7.9), while costing about 16.2x less than Step 3.7 Flash (medium).

Detailed comparison

Metric GPT-6 Luna GPT-6 Luna medium Release: 2026-09-23 Step 3.7 Flash Step 3.7 Flash medium Release: 2026-05-29
Score 7.9 7.9
Rank #94 #92
Reliability 10.0 10.0
Consistency 8.9 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 72.7% 68.2%
Flaky tests 3 3
Total Runs 66 66
Cost per result 0.218 3.801
Total Cost $0.031 $0.495
Input Price $0.100 / 1M $0.200 / 1M
Output Price $0.500 / 1M $1.150 / 1M
Total Input Tokens 78,946 114,191
Output Tokens 4,635 409,709
Reasoning Tokens 40,519 0
Response Time (avg) 15.87s 23.51s
Response Time (max) 35.14s 152.83s
Response Time (total) 349.09s 517.21s
Parameters ~400B total (~17B active) 198B total (11B active)
Availability Closed Open source

Model generation showcase

Hamster playing table tennis

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

#94 GPT-6 Luna

medium
Cost
$0.002
Time
23.6s
Tokens
2,966 tok

#92 Step 3.7 Flash

medium
Cost
$0.006
Time
46.2s
Tokens
4,466 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
GPT-6 Luna 6.6 4.6 77.8% 2 23.63s 7,302 438 10,222
Step 3.7 Flash 8.8 7.8 88.9% 1 27.42s 7,437 44,797 0

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