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

The average score is effectively tied at 7.5 vs 7.5. Mercury 2.5 Preview (medium) has the lower benchmark cost at $0.024 vs $0.662. Mercury 2.5 Preview (medium) is faster at 3.58s vs 30.98s, with pass rates of 66.7% vs 69.7%.

Last updated at: 2026-09-28

Compared models

Rank
#120
Total Output Tokens
37,467
Response Time (avg)
30.98s
Total Cost
$0.662
Rank
#125
Total Output Tokens
127,034
Response Time (avg)
3.58s
Total Cost
$0.024
Recommended model Mercury 2.5 Preview (medium)

It has the best score here (7.5), while costing about 28.1x less than Ember-1 (low).

Detailed comparison

Metric Ember-1 Ember-1 low Release: 2026-09-28 Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02
Score 7.5 7.5
Rank #120 #125
Reliability 8.1 10.0
Consistency 8.5 9.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 66.7% 69.7%
Flaky tests 4 1
Total Runs 66 66
Cost per result 5.085 0.158
Total Cost $0.662 $0.024
Input Price $3.000 / 1M $0.040 / 1M
Output Price $15.000 / 1M $0.150 / 1M
Total Input Tokens 33,011 112,713
Output Tokens 4,780 5,436
Reasoning Tokens 32,687 121,598
Response Time (avg) 30.98s 3.58s
Response Time (max) 93.10s 17.84s
Response Time (total) 681.50s 78.66s
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.

#120 Ember-1

low
Cost
$0.016
Time
24.2s
Tokens
1,165 tok

#125 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 10.0 10.0 100.0% 0 37.91s 8,097 2,518 13,142
Mercury 2.5 Preview 7.8 10.0 66.7% 0 3.86s 7,839 552 22,126

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