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Claude Opus 5.5 — high vs low

The average score is effectively tied at 9.4 vs 9.4. low has the lower benchmark cost at $1.733 vs $2.133. low is faster at 25.68s vs 27.55s, with pass rates of 87.0% vs 88.4%.

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
#26
Total Output Tokens
25,006
Response Time (avg)
25.68s
Total Cost
$1.733
Recommended model low

It has the strongest score in this comparison (9.4) and the best overall balance of cost and response time across 2 models.

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 high Release: 2026-09-23 Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23
Score 9.4 9.4
Rank #28 #26
Reliability 10.0 10.0
Consistency 9.3 9.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 87.0% 88.4%
Flaky tests 2 2
Total Runs 69 69
Cost per result 11.222 9.118
Total Cost $2.133 $1.733
Input Price $4.000 / 1M $4.000 / 1M
Output Price $20.000 / 1M $20.000 / 1M
Cache Read Price $0.200 / 1M $0.200 / 1M
Cache Write Price $5.000 / 1M $5.000 / 1M
Total Input Tokens 319,095 308,056
Output Tokens 10,371 9,434
Reasoning Tokens 32,411 15,572
Response Time (avg) 27.55s 25.68s
Response Time (max) 95.95s 89.16s
Response Time (total) 633.73s 590.71s
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

#26 Claude Opus 5.5

low
Invalid SVG
Cost
$0.038
Time
19.1s
Tokens
2,010 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 5.5 10.0 10.0 100.0% 0 12.23s 10,608 575 2,777

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