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Claude Opus 5 vs GPT-5.6 Luna (high)

GPT-5.6 Luna (high) leads on average score with 8.0 vs 7.1. GPT-5.6 Luna (high) has the lower benchmark cost at $0.118 vs $2.766. Claude Opus 5 is faster at 10.78s vs 18.39s, with pass rates of 55.1% vs 71.0%.

Last updated at: 2026-10-24

Compared models

Rank
#181
Total Output Tokens
31,386
Response Time (avg)
10.78s
Total Cost
$2.766
Rank
#113
Total Output Tokens
139,395
Response Time (avg)
18.39s
Total Cost
$0.118
Recommended model GPT-5.6 Luna (high)

It has the best score here (8.0), while costing about 23.5x less than Claude Opus 5.

Detailed comparison

Metric Claude Opus 5 Claude Opus 5 none Release: 2026-07-25 GPT-5.6 Luna GPT-5.6 Luna high Release: 2026-07-09
Score 7.1 8.0
Rank #181 #113
Reliability 10.0 10.0
Consistency 9.6 8.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 55.1% 71.0%
Flaky tests 1 4
Total Runs 69 69
Cost per result 23.044 5.882
Total Cost $2.766 $0.118
Input Price $5.000 / 1M $0.200 / 1M
Output Price $25.000 / 1M $1.200 / 1M
Cache Read Price $0.500 / 1M $0.020 / 1M
Cache Write Price $6.250 / 1M $0.250 / 1M
Total Input Tokens 396,120 197,896
Output Tokens 31,386 6,211
Reasoning Tokens 0 133,184
Response Time (avg) 10.78s 18.39s
Response Time (max) 79.61s 111.09s
Response Time (total) 247.96s 422.93s
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.

#181 Claude Opus 5

none
Cost
$0.271
Time
149.3s
Tokens
10,962 tok

#113 GPT-5.6 Luna

high
Cost
$0.033
Time
34.2s
Tokens
5,484 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 5 5.9 9.7 33.3% 0 5.54s 10,590 2,886 0
GPT-5.6 Luna 5.5 4.7 55.6% 2 15.63s 7,302 510 17,746

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