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Ember-1 vs GPT-5.6 Luna

The average score is effectively tied at 5.4 vs 5.3. GPT-5.6 Luna has the lower benchmark cost at $0.042 vs $0.786. GPT-5.6 Luna is faster at 3.78s vs 22.65s, with pass rates of 43.5% vs 34.8%.

Last updated at: 2026-10-07

Compared models

Rank
#295
Total Output Tokens
11,832
Response Time (avg)
22.65s
Total Cost
$0.786
Rank
#297
Total Output Tokens
8,000
Response Time (avg)
3.78s
Total Cost
$0.042
Recommended model GPT-5.6 Luna

It has the best score here (5.3), while costing about 18.9x less than Ember-1.

Detailed comparison

Metric Ember-1 Ember-1 none Release: 2026-09-28 GPT-5.6 Luna GPT-5.6 Luna none Release: 2026-07-09
Score 5.4 5.3
Rank #295 #297
Reliability 8.8 10.0
Consistency 8.6 8.8
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 43.5% 34.8%
Flaky tests 4 3
Total Runs 69 69
Cost per result 9.817 2.814
Total Cost $0.786 $0.042
Input Price $3.000 / 1M $0.200 / 1M
Output Price $15.000 / 1M $1.200 / 1M
Cache Read Price $0.300 / 1M $0.020 / 1M
Cache Write Price N/A $0.250 / 1M
Total Input Tokens 202,617 230,744
Output Tokens 11,832 8,000
Reasoning Tokens 0 0
Response Time (avg) 22.65s 3.78s
Response Time (max) 93.12s 53.77s
Response Time (total) 520.91s 86.83s
Parameters ~2.8T total (~104B active) ~400B total (~17B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#295 Ember-1

none
Cost
$0.156
Time
224.6s
Tokens
10,555 tok

#297 GPT-5.6 Luna

none
Cost
$0.016
Time
15.8s
Tokens
2,685 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 5.5 10.0 33.3% 0 1.94s 7,485 393 0
GPT-5.6 Luna 3.8 7.2 22.2% 1 980ms 7,302 459 0

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