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Ember-1 (high) vs Mercury 2.5 Preview (medium)

Ember-1 (high) leads on average score with 6.9 vs 6.8. Mercury 2.5 Preview (medium) has the lower benchmark cost at $0.037 vs $2.405. Mercury 2.5 Preview (medium) is faster at 6.66s vs 58.14s, with pass rates of 71.0% vs 66.7%.

Last updated at: 2026-10-01

Compared models

Rank
#164
Total Output Tokens
121,223
Response Time (avg)
58.14s
Total Cost
$2.405
Rank
#171
Total Output Tokens
150,107
Response Time (avg)
6.66s
Total Cost
$0.037
Recommended model Mercury 2.5 Preview (medium)

Its score stays close to the best score here (6.8 vs 6.9), while costing about 65.8x less than Ember-1 (high).

Detailed comparison

Metric Ember-1 Ember-1 high Release: 2026-09-28 Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02
Score 6.9 6.8
Rank #164 #171
Reliability 8.6 10.0
Consistency 7.2 9.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 71.0% 66.7%
Flaky tests 8 1
Total Runs 69 69
Cost per result 20.041 0.244
Total Cost $2.405 $0.037
Input Price $3.000 / 1M $0.000 / 1M
Output Price $15.000 / 1M $0.000 / 1M
Total Input Tokens 195,489 397,291
Output Tokens 12,475 6,355
Reasoning Tokens 108,748 143,752
Response Time (avg) 58.14s 6.66s
Response Time (max) 255.06s 74.63s
Response Time (total) 1337.19s 153.29s
Parameters ~2.8T total (~104B active) ~100B
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#164 Ember-1

high
Cost
$0.038
Time
55.1s
Tokens
2,671 tok

#171 Mercury 2.5 Preview

medium
Cost
$0.001
Time
2.7s
Tokens
2,241 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
Ember-1 8.2 7.2 88.9% 1 72.23s 7,144 1,281 23,093
Mercury 2.5 Preview 7.8 10.0 66.7% 0 3.86s 7,839 552 22,126

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