Navigate
Advertise here

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

Claude Opus 5.5 (low) leads on average score with 9.4 vs 9.4. Claude Opus 5.5 (low) has the lower benchmark cost at $1.733 vs $2.870. Claude Opus 5 (medium) is faster at 13.24s vs 25.68s, with pass rates of 88.4% vs 84.1%.

Last updated at: 2026-10-26

Compared models

Rank
#26
Total Output Tokens
25,006
Response Time (avg)
25.68s
Total Cost
$1.733
Rank
#31
Total Output Tokens
43,450
Response Time (avg)
13.24s
Total Cost
$2.870
Recommended model Claude Opus 5.5 (low)

It has the best score here (9.4), while costing about 1.7x less than Claude Opus 5 (medium).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23 Claude Opus 5 Claude Opus 5 medium Release: 2026-07-25
Score 9.4 9.4
Rank #26 #31
Reliability 10.0 10.0
Consistency 9.3 9.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 88.4% 84.1%
Flaky tests 2 1
Total Runs 69 69
Cost per result 9.118 15.102
Total Cost $1.733 $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 308,056 356,605
Output Tokens 9,434 26,715
Reasoning Tokens 15,572 17,041
Response Time (avg) 25.68s 13.24s
Response Time (max) 89.16s 78.80s
Response Time (total) 590.71s 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.

#26 Claude Opus 5.5

low
Invalid SVG
Cost
$0.038
Time
19.1s
Tokens
2,010 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 12.23s 10,608 575 2,777
Claude Opus 5 10.0 10.0 100.0% 0 9.56s 10,590 5,224 1,162

Switch Comparison Pair