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GPT-5.6 Luna (low) vs Qwen3.5-Flash (medium)

The average score is effectively tied at 6.9 vs 6.8. GPT-5.6 Luna (low) has the lower benchmark cost at $0.049 vs $0.184. GPT-5.6 Luna (low) is faster at 6.96s vs 83.68s, with pass rates of 56.5% vs 66.7%.

Last updated at: 2026-10-16

Compared models

Rank
#193
Total Output Tokens
28,001
Response Time (avg)
6.96s
Total Cost
$0.049
Rank
#197
Total Output Tokens
531,668
Response Time (avg)
83.68s
Total Cost
$0.184
Recommended model GPT-5.6 Luna (low)

It has the best score here (6.9), while costing about 3.8x less than Qwen3.5-Flash (medium).

Detailed comparison

Metric GPT-5.6 Luna GPT-5.6 Luna low Release: 2026-07-09 Qwen3.5-Flash Qwen3.5-Flash medium Release: 2026-02-24
Score 6.9 6.8
Rank #193 #197
Reliability 10.0 10.0
Consistency 8.3 7.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 56.5% 66.7%
Flaky tests 5 6
Total Runs 69 69
Cost per result 2.428 1.533
Total Cost $0.049 $0.184
Input Price $0.200 / 1M $0.065 / 1M
Output Price $1.200 / 1M $0.260 / 1M
Cache Read Price $0.020 / 1M N/A
Cache Write Price $0.250 / 1M N/A
Total Input Tokens 202,680 349,177
Output Tokens 9,230 54,279
Reasoning Tokens 18,771 477,389
Response Time (avg) 6.96s 83.68s
Response Time (max) 45.74s 515.38s
Response Time (total) 160.19s 1840.92s
Parameters ~400B total (~17B active) ~35B total (~3B 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.

#193 GPT-5.6 Luna

low
Cost
$0.011
Time
10.2s
Tokens
1,897 tok

#197 Qwen3.5-Flash

medium
Cost
$0.002
Time
25.8s
Tokens
4,294 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-5.6 Luna 5.5 10.0 33.3% 0 4.61s 7,302 557 3,535
Qwen3.5-Flash 3.7 7.2 22.2% 1 58.87s 6,685 302 90,081

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