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Ember-1 (max) vs GPT-5.4

Ember-1 (max) leads on average score with 5.9 vs 5.8. GPT-5.4 has the lower benchmark cost at $0.397 vs $2.792. GPT-5.4 is faster at 2.08s vs 98.92s, with pass rates of 57.6% vs 34.9%.

Last updated at: 2026-09-28

Compared models

Rank
#248
Total Output Tokens
180,806
Response Time (avg)
98.92s
Total Cost
$2.792
Rank
#254
Total Output Tokens
8,339
Response Time (avg)
2.08s
Total Cost
$0.397
Recommended model GPT-5.4

Its score stays close to the best score here (5.8 vs 5.9), while costing about 7.0x less than Ember-1 (max).

Detailed comparison

Metric Ember-1 Ember-1 max Release: 2026-09-28 GPT-5.4 GPT-5.4 none Release: 2026-03-05
Score 5.9 5.8
Rank #248 #254
Reliability 7.5 10.0
Consistency 7.7 9.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 57.6% 34.9%
Flaky tests 6 2
Total Runs 66 66
Cost per result 27.915 5.667
Total Cost $2.792 $0.397
Input Price $3.000 / 1M $2.500 / 1M
Output Price $15.000 / 1M $15.000 / 1M
Total Input Tokens 26,449 108,641
Output Tokens 4,183 8,339
Reasoning Tokens 176,623 0
Response Time (avg) 98.92s 2.08s
Response Time (max) 587.08s 15.63s
Response Time (total) 2176.20s 45.75s
Parameters ~2.8T total (~104B active) ~1.5T total (~100B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#248 Ember-1

max
Cost
$0.163
Time
229.4s
Tokens
11,002 tok

#254 GPT-5.4

none
Cost
$0.026
Time
18.1s
Tokens
1,792 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 5.2 4.4 55.6% 2 105.09s 3,362 1,149 27,957
GPT-5.4 5.5 10.0 33.3% 0 1.62s 7,305 516 0

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