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Claude Opus 4.8 (low) vs GPT-6 Luna (medium)

GPT-6 Luna (medium) leads on average score with 7.9 vs 7.8. GPT-6 Luna (medium) has the lower benchmark cost at $0.031 vs $2.089. Claude Opus 4.8 (low) is faster at 12.88s vs 15.87s, with pass rates of 80.3% vs 72.7%.

Last updated at: 2026-09-23

Compared models

Rank
#103
Total Output Tokens
52,237
Response Time (avg)
12.88s
Total Cost
$2.089
Rank
#94
Total Output Tokens
45,154
Response Time (avg)
15.87s
Total Cost
$0.031
Recommended model GPT-6 Luna (medium)

It has the best score here (7.9), while costing about 68.5x less than Claude Opus 4.8 (low).

Detailed comparison

Metric Claude Opus 4.8 Claude Opus 4.8 low Release: 2026-05-28 GPT-6 Luna GPT-6 Luna medium Release: 2026-09-23
Score 7.8 7.9
Rank #103 #94
Reliability 10.0 10.0
Consistency 8.9 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 80.3% 72.7%
Flaky tests 3 3
Total Runs 66 66
Cost per result 13.054 0.218
Total Cost $2.089 $0.031
Input Price $5.000 / 1M $0.100 / 1M
Output Price $25.000 / 1M $0.500 / 1M
Total Input Tokens 156,522 78,946
Output Tokens 43,056 4,635
Reasoning Tokens 9,181 40,519
Response Time (avg) 12.88s 15.87s
Response Time (max) 127.97s 35.14s
Response Time (total) 283.32s 349.09s
Parameters ~5T total (~500B active) ~400B total (~17B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#103 Claude Opus 4.8

low
Cost
$0.031
Time
14.1s
Tokens
1,345 tok

#94 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
Claude Opus 4.8 6.6 4.6 77.8% 2 7.58s 10,590 3,637 809
GPT-6 Luna 6.6 4.6 77.8% 2 23.63s 7,302 438 10,222

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