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Claude Opus 4.8 vs Ember-1 (high)

The average score is effectively tied at 6.9 vs 6.9. Claude Opus 4.8 has the lower benchmark cost at $2.328 vs $2.405. Claude Opus 4.8 is faster at 7.71s vs 58.14s, with pass rates of 60.9% vs 71.0%.

Last updated at: 2026-10-01

Compared models

Rank
#162
Total Output Tokens
24,523
Response Time (avg)
7.71s
Total Cost
$2.328
Rank
#164
Total Output Tokens
121,223
Response Time (avg)
58.14s
Total Cost
$2.405
Recommended model Claude Opus 4.8

It has the best score here (6.9), while responding about 7.5x faster than Ember-1 (high).

Detailed comparison

Metric Claude Opus 4.8 Claude Opus 4.8 none Release: 2026-05-28 Ember-1 Ember-1 high Release: 2026-09-28
Score 6.9 6.9
Rank #162 #164
Reliability 10.0 8.6
Consistency 9.3 7.2
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 60.9% 71.0%
Flaky tests 2 8
Total Runs 69 69
Cost per result 17.906 20.041
Total Cost $2.328 $2.405
Input Price $5.000 / 1M $3.000 / 1M
Output Price $25.000 / 1M $15.000 / 1M
Total Input Tokens 342,921 195,489
Output Tokens 24,523 12,475
Reasoning Tokens 0 108,748
Response Time (avg) 7.71s 58.14s
Response Time (max) 69.14s 255.06s
Response Time (total) 177.38s 1337.19s
Parameters ~5T total (~500B active) ~2.8T total (~104B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#162 Claude Opus 4.8

none
Cost
$0.053
Time
22.0s
Tokens
2,253 tok

#164 Ember-1

high
Cost
$0.038
Time
55.1s
Tokens
2,671 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 5.5 10.0 33.3% 0 3.29s 10,590 1,332 0
Ember-1 8.2 7.2 88.9% 1 72.23s 7,144 1,281 23,093

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