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GPT-5.6 Luna vs Laguna S 2.1 (high)

The average score is effectively tied at 5.4 vs 5.4. GPT-5.6 Luna has the lower benchmark cost at $0.029 vs $0.114. GPT-5.6 Luna is faster at 1.50s vs 111.60s, with pass rates of 36.4% vs 27.3%.

Last updated at: 2026-09-04

Rank
#241
Total Output Tokens
6,709
Response Time (avg)
1.50s
Total Cost
$0.029
Rank
#245
Total Output Tokens
584,864
Response Time (avg)
111.60s
Total Cost
$0.114
Recommended model GPT-5.6 Luna

It has the best score here (5.4), while costing about 4.0x less than Laguna S 2.1 (high).

Detailed comparison

Metric GPT-5.6 Luna GPT-5.6 Luna none Release: 2026-07-09 Laguna S 2.1 Laguna S 2.1 high Release: 2026-07-21 Free Available
Score 5.4 5.4
Rank #241 #245
Reliability 10.0 10.0
Consistency 8.8 8.1
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 36.4% 27.3%
Flaky tests 3 5
Total Runs 66 66
Cost per result 2.357 3.153
Total Cost $0.029 $0.114
Input Price $0.200 / 1M $0.090 / 1M
Output Price $1.200 / 1M $0.180 / 1M
Total Input Tokens 101,332 208,937
Output Tokens 6,709 175,588
Reasoning Tokens 0 409,276
Response Time (avg) 1.50s 111.60s
Response Time (max) 10.57s 1190.11s
Response Time (total) 33.05s 2455.24s
Parameters ~400B total (~17B active) 118B total (8B active)
Availability Closed Weights available

Model generation showcase

Hamster playing table tennis

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

#241 GPT-5.6 Luna

none
Cost
$0.016
Time
15.8s
Tokens
2,685 tok

#245 Laguna S 2.1

high
Cost
$0.001
Time
6.8s
Tokens
1,389 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 3.8 7.2 22.2% 1 980ms 7,302 459 0
Laguna S 2.1 5.3 7.2 44.4% 1 271.42s 6,496 59,355 151,009

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