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Mercury 2.5 (high) vs Grok 4.20 (medium)

Mercury 2.5 (high) leads on average score with 7.1 vs 7.0. Mercury 2.5 (high) has the lower benchmark cost at $0.031 vs $0.805. Mercury 2.5 (high) is faster at 4.32s vs 32.56s, with pass rates of 62.1% vs 60.6%.

Last updated at: 2026-09-08

Compared models

Rank
#134
Total Output Tokens
174,547
Response Time (avg)
4.32s
Total Cost
$0.031
Rank
#141
Total Output Tokens
270,259
Response Time (avg)
32.56s
Total Cost
$0.805
Recommended model Mercury 2.5 (high)

It has the best score here (7.1), while costing about 26.0x less than Grok 4.20 (medium).

Detailed comparison

Metric Mercury 2.5 Mercury 2.5 high Release: 2026-09-08 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.1 7.0
Rank #134 #141
Reliability 9.7 10.0
Consistency 8.6 8.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 62.1% 60.6%
Flaky tests 4 5
Total Runs 66 66
Cost per result 0.259 10.365
Total Cost $0.031 $0.805
Input Price $0.040 / 1M $1.250 / 1M
Output Price $0.150 / 1M $2.500 / 1M
Total Input Tokens 120,068 102,986
Output Tokens 3,402 5,860
Reasoning Tokens 171,145 264,399
Response Time (avg) 4.32s 32.56s
Response Time (max) 23.63s 199.66s
Response Time (total) 95.06s 716.36s
Parameters ~100B ~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.

#134 Mercury 2.5

high
Cost
$0.001
Time
3.5s
Tokens
2,447 tok

#141 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
Mercury 2.5 6.4 7.8 44.4% 1 6.58s 7,757 415 44,012
Grok 4.20 6.3 6.6 55.6% 1 109.93s 8,307 268 103,150

Quick Compare

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