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Grok 4.20 (medium) vs GLM 5.1 (medium)

The average score is effectively tied at 7.0 vs 7.0. GLM 5.1 (medium) has the lower benchmark cost at $0.726 vs $0.805. Grok 4.20 (medium) is faster at 32.56s vs 58.80s, with pass rates of 60.6% vs 65.2%.

Last updated at: 2026-09-29

Compared models

Rank
#175
Total Output Tokens
270,259
Response Time (avg)
32.56s
Total Cost
$0.805
Rank
#172
Total Output Tokens
215,889
Response Time (avg)
58.80s
Total Cost
$0.726
Recommended model Grok 4.20 (medium)

It has the best score here (7.0), while responding about 1.8x faster than GLM 5.1 (medium).

Detailed comparison

Metric Grok 4.20 Grok 4.20 medium Release: 2026-03-31 GLM 5.1 GLM 5.1 medium Release: 2026-04-07
Score 7.0 7.0
Rank #175 #172
Reliability 10.0 8.1
Consistency 8.2 8.4
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 60.6% 65.2%
Flaky tests 5 4
Total Runs 66 66
Cost per result 10.365 6.923
Total Cost $0.805 $0.726
Input Price $1.250 / 1M $0.965 / 1M
Output Price $2.500 / 1M $3.032 / 1M
Total Input Tokens 102,986 82,592
Output Tokens 5,860 16,089
Reasoning Tokens 264,399 199,800
Response Time (avg) 32.56s 58.80s
Response Time (max) 199.66s 308.75s
Response Time (total) 716.36s 1234.72s
Parameters ~1T total (~100B active) 744B total (40B active)
Availability Closed Open source

Model generation showcase

Hamster playing table tennis

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

#175 SpaceXAI: Grok 4.20

medium
Cost
$0.041
Time
110.3s
Tokens
16,336 tok

#172 GLM 5.1

medium
Reached the allocated time limit (300 seconds) without receiving showcase output.
Cost
$0.000
Time
300.0s
Tokens
0 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
Grok 4.20 6.3 6.6 55.6% 1 109.93s 8,307 268 103,150
GLM 5.1 4.6 3.7 44.5% 2 109.63s 5,702 4,871 37,826

Quick Compare

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