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Claude Opus 5.5 (medium) vs Pareto (default)

Claude Opus 5.5 (medium) leads on average score with 9.2 vs 9.1. Pareto (default) has the lower benchmark cost at $1.520 vs $1.804. Claude Opus 5.5 (medium) is faster at 25.85s vs 33.47s, with pass rates of 89.9% vs 87.0%.

Last updated at: 2026-10-26

Compared models

Rank
#36
Total Output Tokens
32,127
Response Time (avg)
25.85s
Total Cost
$1.804
Rank
#47
Total Output Tokens
128,144
Response Time (avg)
33.47s
Total Cost
$1.520
Recommended model Claude Opus 5.5 (medium)

It has the strongest score in this comparison (9.2) and the best overall balance of cost and response time across 2 models.

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 medium Release: 2026-09-23 Pareto Pareto default Release: 2026-09-18
Score 9.2 9.1
Rank #36 #47
Reliability 10.0 10.0
Consistency 9.7 9.2
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 89.9% 87.0%
Flaky tests 1 2
Total Runs 69 69
Cost per result 9.016 8.000
Total Cost $1.804 $1.520
Input Price $4.000 / 1M $2.500 / 1M
Output Price $20.000 / 1M $7.500 / 1M
Cache Read Price $0.200 / 1M $0.250 / 1M
Cache Write Price $5.000 / 1M N/A
Total Input Tokens 290,117 223,559
Output Tokens 9,805 128,144
Reasoning Tokens 22,322 0
Response Time (avg) 25.85s 33.47s
Response Time (max) 90.20s 143.33s
Response Time (total) 594.63s 769.84s
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.

#36 Claude Opus 5.5

medium
Cost
$0.053
Time
25.6s
Tokens
2,781 tok

#47 Pareto

default
Cost
$0.034
Time
170.7s
Tokens
4,581 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 8.4 7.4 88.9% 1 13.50s 10,608 636 4,341
Pareto 10.0 10.0 100.0% 0 50.12s 7,471 1,949 0

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