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Ember-1 (high) vs GPT-5.5

Ember-1 (high) leads on average score with 7.1 vs 7.0. GPT-5.5 has the lower benchmark cost at $0.544 vs $1.798. GPT-5.5 is faster at 2.35s vs 56.77s, with pass rates of 71.2% vs 59.1%.

Last updated at: 2026-09-28

Compared models

Rank
#158
Total Output Tokens
110,125
Response Time (avg)
56.77s
Total Cost
$1.798
Rank
#165
Total Output Tokens
4,915
Response Time (avg)
2.35s
Total Cost
$0.544
Recommended model GPT-5.5

Its score stays close to the best score here (7.0 vs 7.1), while costing about 3.3x less than Ember-1 (high).

Detailed comparison

Metric Ember-1 Ember-1 high Release: 2026-09-28 GPT-5.5 GPT-5.5 none Release: 2026-04-24
Score 7.1 7.0
Rank #158 #165
Reliability 8.0 10.0
Consistency 7.3 9.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 71.2% 59.1%
Flaky tests 7 2
Total Runs 66 66
Cost per result 14.981 4.533
Total Cost $1.798 $0.544
Input Price $3.000 / 1M $5.000 / 1M
Output Price $15.000 / 1M $30.000 / 1M
Total Input Tokens 48,577 79,294
Output Tokens 7,345 4,915
Reasoning Tokens 102,780 0
Response Time (avg) 56.77s 2.35s
Response Time (max) 255.06s 12.24s
Response Time (total) 1248.88s 51.78s
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.

#158 Ember-1

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

#165 GPT-5.5

none
Cost
$0.090
Time
54.3s
Tokens
3,063 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
GPT-5.5 5.5 10.0 33.3% 0 1.35s 7,305 462 0

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