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Claude Opus 4.8 (medium) vs Claude Opus 5 (low)

The average score is effectively tied at 8.8 vs 8.7. Claude Opus 5 (low) has the lower benchmark cost at $1.121 vs $1.983. Claude Opus 5 (low) is faster at 6.99s vs 12.97s, with pass rates of 83.3% vs 83.3%.

Last updated at: 2026-09-07

Compared models

Rank
#39
Total Output Tokens
51,927
Response Time (avg)
12.97s
Total Cost
$1.983
Rank
#40
Total Output Tokens
17,992
Response Time (avg)
6.99s
Total Cost
$1.121
Recommended model Claude Opus 5 (low)

It has the best score here (8.7), while costing about 1.8x less than Claude Opus 4.8 (medium).

Detailed comparison

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Claude Opus 5 Claude Opus 5 low Release: 2026-07-25
Score 8.8 8.7
Rank #39 #40
Reliability 10.0 10.0
Consistency 9.2 9.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 83.3% 83.3%
Flaky tests 2 1
Total Runs 66 66
Cost per result 11.662 6.223
Total Cost $1.983 $1.121
Input Price $5.000 / 1M $5.000 / 1M
Output Price $25.000 / 1M $25.000 / 1M
Total Input Tokens 138,448 134,770
Output Tokens 40,765 13,604
Reasoning Tokens 11,162 4,388
Response Time (avg) 12.97s 6.99s
Response Time (max) 70.54s 30.67s
Response Time (total) 285.29s 153.80s
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.

#39 Claude Opus 4.8

medium
Cost
$0.057
Time
23.1s
Tokens
2,412 tok

#40 Claude Opus 5

low
Cost
$0.062
Time
30.2s
Tokens
2,615 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 4.8 10.0 10.0 100.0% 0 15.33s 10,590 9,945 1,381
Claude Opus 5 7.8 7.4 77.8% 1 6.70s 10,590 2,442 760

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