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Claude Opus 5 (low) vs Pareto 26.9 (default)

Claude Opus 5 (low) leads on average score with 9.0 vs 8.9. Pareto 26.9 (default) has the lower benchmark cost at $1.864 vs $2.350. Claude Opus 5 (low) is faster at 9.87s vs 28.26s, with pass rates of 84.1% vs 79.7%.

Last updated at: 2026-10-15

Compared models

Rank
#48
Total Output Tokens
23,416
Response Time (avg)
9.87s
Total Cost
$2.350
Rank
#55
Total Output Tokens
175,696
Response Time (avg)
28.26s
Total Cost
$1.864
Recommended model Claude Opus 5 (low)

It has the best score here (9.0), while responding about 2.9x faster than Pareto 26.9 (default).

Detailed comparison

Metric Claude Opus 5 Claude Opus 5 low Release: 2026-07-25 Pareto 26.9 Pareto 26.9 default Release: 2026-10-15
Score 9.0 8.9
Rank #48 #55
Reliability 10.0 10.0
Consistency 9.7 8.1
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 84.1% 79.7%
Flaky tests 1 6
Total Runs 69 69
Cost per result 12.367 12.422
Total Cost $2.350 $1.864
Input Price $5.000 / 1M $2.500 / 1M
Output Price $25.000 / 1M $7.500 / 1M
Cache Read Price $0.500 / 1M $0.250 / 1M
Cache Write Price $6.250 / 1M N/A
Total Input Tokens 352,845 218,199
Output Tokens 16,553 175,696
Reasoning Tokens 7,007 0
Response Time (avg) 9.87s 28.26s
Response Time (max) 73.15s 151.76s
Response Time (total) 226.95s 649.90s
Parameters ~5T total (~500B 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.

#48 Claude Opus 5

low
Cost
$0.062
Time
30.2s
Tokens
2,615 tok

#55 Pareto 26.9

default
Cost
$0.038
Time
109.6s
Tokens
5,118 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 7.8 7.4 77.8% 1 6.70s 10,590 2,442 760
Pareto 26.9 10.0 10.0 100.0% 0 49.15s 7,419 1,895 0

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