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

The average score is effectively tied at 8.3 vs 8.3. GPT-6 Luna (medium) has the lower benchmark cost at $0.047 vs $3.490. Claude Opus 4.8 (medium) is faster at 16.72s vs 18.07s, with pass rates of 82.6% vs 73.9%.

Last updated at: 2026-10-09

Compared models

Rank
#84
Total Output Tokens
67,522
Response Time (avg)
16.72s
Total Cost
$3.490
Rank
#83
Total Output Tokens
53,161
Response Time (avg)
18.07s
Total Cost
$0.047
Recommended model GPT-6 Luna (medium)

It has the best score here (8.3), while costing about 74.4x less than Claude Opus 4.8 (medium).

Detailed comparison

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 GPT-6 Luna GPT-6 Luna medium Release: 2026-09-23
Score 8.3 8.3
Rank #84 #83
Reliability 10.0 10.0
Consistency 9.0 8.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 82.6% 73.9%
Flaky tests 3 3
Total Runs 69 69
Cost per result 20.527 0.313
Total Cost $3.490 $0.047
Input Price $5.000 / 1M $0.100 / 1M
Output Price $25.000 / 1M $0.500 / 1M
Cache Read Price $0.500 / 1M $0.010 / 1M
Cache Write Price $6.250 / 1M $0.125 / 1M
Total Input Tokens 360,294 203,193
Output Tokens 43,441 5,751
Reasoning Tokens 24,401 47,410
Response Time (avg) 16.72s 18.07s
Response Time (max) 99.37s 66.44s
Response Time (total) 384.66s 415.53s
Parameters ~5T total (~500B 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.

#84 Claude Opus 4.8

medium
Cost
$0.057
Time
23.1s
Tokens
2,412 tok

#83 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 10.0 10.0 100.0% 0 15.33s 10,590 9,945 1,381
GPT-6 Luna 6.6 4.6 77.8% 2 23.63s 7,302 438 10,222

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