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Claude Haiku 5.5 (low) vs GPT-5.6 Luna (medium)

Claude Haiku 5.5 (low) leads on average score with 8.6 vs 7.4. Claude Haiku 5.5 (low) has the lower benchmark cost at $0.061 vs $0.065. Claude Haiku 5.5 (low) is faster at 7.51s vs 9.64s, with pass rates of 76.8% vs 62.3%.

Last updated at: 2026-10-07

Compared models

Rank
#64
Total Output Tokens
61,650
Response Time (avg)
7.51s
Total Cost
$0.061
Rank
#132
Total Output Tokens
47,986
Response Time (avg)
9.64s
Total Cost
$0.065
Recommended model Claude Haiku 5.5 (low)

It has the strongest score in this comparison (8.6) and the best overall balance of cost and response time across 2 models.

Detailed comparison

Metric Claude Haiku 5.5 Claude Haiku 5.5 low Release: 2026-10-07 GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09
Score 8.6 7.4
Rank #64 #132
Reliability 10.0 10.0
Consistency 8.9 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 76.8% 62.3%
Flaky tests 3 3
Total Runs 69 69
Cost per result 0.378 2.822
Total Cost $0.061 $0.065
Input Price $0.100 / 1M $0.200 / 1M
Output Price $0.500 / 1M $1.200 / 1M
Cache Read Price $0.010 / 1M $0.020 / 1M
Cache Write Price $0.125 / 1M $0.250 / 1M
Total Input Tokens 296,301 212,780
Output Tokens 10,672 6,849
Reasoning Tokens 50,978 41,137
Response Time (avg) 7.51s 9.64s
Response Time (max) 44.43s 58.09s
Response Time (total) 172.74s 221.62s
Parameters ~50B ~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.

#64 Claude Haiku 5.5

low
Cost
$0.001
Time
7.4s
Tokens
1,851 tok

#132 GPT-5.6 Luna

medium
Cost
$0.014
Time
14.6s
Tokens
2,362 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 Haiku 5.5 7.9 7.5 77.8% 1 7.30s 10,608 531 11,618
GPT-5.6 Luna 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928

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