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Grok 4.20 (medium) vs Grok 4.3 (medium)

The average score is effectively tied at 7.0 vs 7.0. Grok 4.3 (medium) has the lower benchmark cost at $0.741 vs $0.805. Grok 4.20 (medium) is faster at 32.56s vs 44.21s, with pass rates of 60.6% vs 66.7%.

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
#167
Total Output Tokens
225,904
Response Time (avg)
44.21s
Total Cost
$0.741
Recommended model Grok 4.20 (medium)

It has the strongest score in this comparison (7.0) and the best overall balance of cost and response time across all 2 models.

Detailed comparison

Metric Grok 4.20 Grok 4.20 medium Release: 2026-03-31 Grok 4.3 Grok 4.3 medium Release: 2026-05-01
Score 7.0 7.0
Rank #175 #167
Reliability 10.0 10.0
Consistency 8.2 8.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 60.6% 66.7%
Flaky tests 5 5
Total Runs 66 66
Cost per result 10.365 6.168
Total Cost $0.805 $0.741
Input Price $1.250 / 1M $1.250 / 1M
Output Price $2.500 / 1M $2.500 / 1M
Total Input Tokens 102,986 140,244
Output Tokens 5,860 13,739
Reasoning Tokens 264,399 212,165
Response Time (avg) 32.56s 44.21s
Response Time (max) 199.66s 216.69s
Response Time (total) 716.36s 972.64s
Parameters ~1T total (~100B active) ~1.5T total (~150B active)
Availability Closed Closed

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

#167 SpaceXAI: Grok 4.3

medium
Cost
$0.009
Time
19.0s
Tokens
3,661 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
Grok 4.3 5.9 7.7 44.4% 1 41.23s 8,340 1,028 31,226

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