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Mercury 2.5 (high) vs Grok 4.3 (medium)

The average score is effectively tied at 7.1 vs 7.0. Mercury 2.5 (high) has the lower benchmark cost at $0.031 vs $0.741. Mercury 2.5 (high) is faster at 4.32s vs 44.21s, with pass rates of 62.1% vs 66.7%.

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
#135
Total Output Tokens
225,904
Response Time (avg)
44.21s
Total Cost
$0.741
Recommended model Mercury 2.5 (high)

It has the best score here (7.1), while costing about 23.9x less than Grok 4.3 (medium).

Detailed comparison

Metric Mercury 2.5 Mercury 2.5 high Release: 2026-09-08 Grok 4.3 Grok 4.3 medium Release: 2026-05-01
Score 7.1 7.0
Rank #134 #135
Reliability 9.7 10.0
Consistency 8.6 8.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 62.1% 66.7%
Flaky tests 4 5
Total Runs 66 66
Cost per result 0.259 6.168
Total Cost $0.031 $0.741
Input Price $0.040 / 1M $1.250 / 1M
Output Price $0.150 / 1M $2.500 / 1M
Total Input Tokens 120,068 140,244
Output Tokens 3,402 13,739
Reasoning Tokens 171,145 212,165
Response Time (avg) 4.32s 44.21s
Response Time (max) 23.63s 216.69s
Response Time (total) 95.06s 972.64s
Parameters ~100B ~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.

#134 Mercury 2.5

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

#135 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
Mercury 2.5 6.4 7.8 44.4% 1 6.58s 7,757 415 44,012
Grok 4.3 5.9 7.7 44.4% 1 41.23s 8,340 1,028 31,226

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