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Claude Opus 5.5 (high) vs Claude Opus 5 (medium)

The average score is effectively tied at 9.4 vs 9.4. Claude Opus 5.5 (high) has the lower benchmark cost at $2.133 vs $2.870. Claude Opus 5 (medium) is faster at 13.24s vs 27.55s, with pass rates of 87.0% vs 84.1%.

Last updated at: 2026-10-26

Compared models

Rank
#28
Total Output Tokens
42,782
Response Time (avg)
27.55s
Total Cost
$2.133
Rank
#31
Total Output Tokens
43,450
Response Time (avg)
13.24s
Total Cost
$2.870
Recommended model Claude Opus 5 (medium)

It has the best score here (9.4), while responding about 2.1x faster than Claude Opus 5.5 (high).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 high Release: 2026-09-23 Claude Opus 5 Claude Opus 5 medium Release: 2026-07-25
Score 9.4 9.4
Rank #28 #31
Reliability 10.0 10.0
Consistency 9.3 9.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 87.0% 84.1%
Flaky tests 2 1
Total Runs 69 69
Cost per result 11.222 15.102
Total Cost $2.133 $2.870
Input Price $4.000 / 1M $5.000 / 1M
Output Price $20.000 / 1M $25.000 / 1M
Cache Read Price $0.200 / 1M $0.500 / 1M
Cache Write Price $5.000 / 1M $6.250 / 1M
Total Input Tokens 319,095 356,605
Output Tokens 10,371 26,715
Reasoning Tokens 32,411 17,041
Response Time (avg) 27.55s 13.24s
Response Time (max) 95.95s 78.80s
Response Time (total) 633.73s 304.46s
Parameters ~5T total (~500B active) ~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.

#28 Claude Opus 5.5

high
Cost
$0.136
Time
75.6s
Tokens
6,934 tok

#31 Claude Opus 5

medium
Cost
$0.125
Time
69.3s
Tokens
5,134 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 10.0 10.0 100.0% 0 13.44s 10,608 584 5,042
Claude Opus 5 10.0 10.0 100.0% 0 9.56s 10,590 5,224 1,162

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