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Ember-1 (high) vs Grok 4.20 (medium)

Ember-1 (high) leads on average score with 7.1 vs 7.0. Grok 4.20 (medium) has the lower benchmark cost at $0.805 vs $1.798. Grok 4.20 (medium) is faster at 32.56s vs 56.77s, with pass rates of 71.2% vs 60.6%.

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
#167
Total Output Tokens
270,259
Response Time (avg)
32.56s
Total Cost
$0.805
Recommended model Grok 4.20 (medium)

Its score stays close to the best score here (7.0 vs 7.1), while costing about 2.2x less than Ember-1 (high).

Detailed comparison

Metric Ember-1 Ember-1 high Release: 2026-09-28 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.1 7.0
Rank #158 #167
Reliability 8.0 10.0
Consistency 7.3 8.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 71.2% 60.6%
Flaky tests 7 5
Total Runs 66 66
Cost per result 14.981 10.365
Total Cost $1.798 $0.805
Input Price $3.000 / 1M $1.250 / 1M
Output Price $15.000 / 1M $2.500 / 1M
Total Input Tokens 48,577 102,986
Output Tokens 7,345 5,860
Reasoning Tokens 102,780 264,399
Response Time (avg) 56.77s 32.56s
Response Time (max) 255.06s 199.66s
Response Time (total) 1248.88s 716.36s
Parameters ~2.8T total (~104B active) ~1T 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

#167 SpaceXAI: Grok 4.20

medium
Cost
$0.041
Time
110.3s
Tokens
16,336 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
Grok 4.20 6.3 6.6 55.6% 1 109.93s 8,307 268 103,150

Quick Compare

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