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Claude Opus 5.5 — high vs low

The average score is effectively tied at 9.3 vs 9.3. low has the lower benchmark cost at $0.952 vs $1.266. low is faster at 23.72s vs 25.88s, with pass rates of 86.4% vs 87.9%.

Last updated at: 2026-09-23

Compared models

Rank
#21
Total Output Tokens
36,457
Response Time (avg)
25.88s
Total Cost
$1.266
Rank
#20
Total Output Tokens
21,004
Response Time (avg)
23.72s
Total Cost
$0.952
Recommended model low

It has the strongest score in this comparison (9.3) and the best overall balance of cost and response time across all 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 9.3 9.3
Rank #21 #20
Reliability 10.0 10.0
Consistency 9.3 9.3
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 86.4% 87.9%
Flaky tests 2 2
Total Runs 66 66
Cost per result 7.029 5.284
Total Cost $1.266 $0.952
Input Price $4.000 / 1M $4.000 / 1M
Output Price $20.000 / 1M $20.000 / 1M
Total Input Tokens 134,020 132,746
Output Tokens 7,237 6,454
Reasoning Tokens 29,220 14,550
Response Time (avg) 25.88s 23.72s
Response Time (max) 95.95s 89.16s
Response Time (total) 569.33s 521.82s
Parameters ~5T total (~500B active) ~5T total (~500B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#21 Claude Opus 5.5

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

#20 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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