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Claude Sonnet 4.6 vs Grok 4.20 (medium)

Claude Sonnet 4.6 leads on average score with 7.3 vs 7.0. Claude Sonnet 4.6 has the lower benchmark cost at $0.661 vs $0.805. Claude Sonnet 4.6 is faster at 7.67s vs 32.56s, with pass rates of 57.6% vs 60.6%.

Last updated at: 2026-08-20

Rank
#98
Total Output Tokens
19,362
Response Time (avg)
7.67s
Total Cost
$0.661
Rank
#121
Total Output Tokens
270,259
Response Time (avg)
32.56s
Total Cost
$0.805
Recommended model Claude Sonnet 4.6

It has the best score here (7.3), while responding about 4.2x faster than Grok 4.20 (medium).

Detailed comparison

Metric Claude Sonnet 4.6 Claude Sonnet 4.6 none Release: 2026-02-17 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.3 7.0
Rank #98 #121
Reliability 10.0 10.0
Consistency 9.7 8.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 57.6% 60.6%
Flaky tests 1 5
Total Runs 66 66
Cost per result 5.503 10.365
Total Cost $0.661 $0.805
Input Price $3.000 / 1M $1.250 / 1M
Output Price $15.000 / 1M $2.500 / 1M
Total Input Tokens 123,273 102,986
Output Tokens 19,362 5,860
Reasoning Tokens 0 264,399
Response Time (avg) 7.67s 32.56s
Response Time (max) 51.18s 199.66s
Response Time (total) 122.78s 716.36s
Parameters ~1T total (~100B 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.

#98 Claude Sonnet 4.6

none
Cost
$0.038
Time
27.3s
Tokens
2,598 tok

#121 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
Claude Sonnet 4.6 5.5 10.0 33.3% 0 5.19s 8,522 2,127 0
Grok 4.20 6.3 6.6 55.6% 1 109.93s 8,307 268 103,150

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