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Claude Sonnet 5.5 (low) vs Claude Sonnet 5

The average score is effectively tied at 6.2 vs 6.1. Claude Sonnet 5 has the lower benchmark cost at $0.548 vs $0.620. Claude Sonnet 5.5 (low) is faster at 5.68s vs 6.05s, with pass rates of 43.9% vs 40.9%.

Last updated at: 2026-09-29

Compared models

Rank
#232
Total Output Tokens
28,630
Response Time (avg)
5.68s
Total Cost
$0.620
Rank
#233
Total Output Tokens
22,508
Response Time (avg)
6.05s
Total Cost
$0.548
Recommended model Claude Sonnet 5

It has the strongest score in this comparison (6.1) and the best overall balance of cost and response time across all 2 models.

Detailed comparison

Metric Claude Sonnet 5.5 Claude Sonnet 5.5 low Release: 2026-09-29 Claude Sonnet 5 Claude Sonnet 5 none Release: 2026-06-30
Score 6.2 6.1
Rank #232 #233
Reliability 10.0 10.0
Consistency 9.4 8.7
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 43.9% 40.9%
Flaky tests 2 4
Total Runs 66 66
Cost per result 6.880 7.817
Total Cost $0.620 $0.548
Input Price $2.000 / 1M $2.000 / 1M
Output Price $10.000 / 1M $10.000 / 1M
Total Input Tokens 166,418 161,032
Output Tokens 21,456 22,508
Reasoning Tokens 7,174 0
Response Time (avg) 5.68s 6.05s
Response Time (max) 22.74s 33.39s
Response Time (total) 124.87s 132.99s
Parameters ~1T total (~100B active) ~1T total (~100B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#232 Claude Sonnet 5.5

low
Cost
$0.020
Time
15.3s
Tokens
2,077 tok

#233 Claude Sonnet 5

none
Cost
$0.061
Time
53.7s
Tokens
6,172 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 Sonnet 5.5 3.2 9.7 0.0% 0 5.81s 10,608 5,903 0
Claude Sonnet 5 4.6 7.9 22.2% 1 3.67s 10,590 1,864 0

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