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Mercury 2.5 (high) vs Grok 4.3 (medium)

The average score is effectively tied at 6.5 vs 6.5. Mercury 2.5 (high) has the lower benchmark cost at $0.044 vs $0.989. Mercury 2.5 (high) is faster at 7.62s vs 44.53s, with pass rates of 59.4% vs 63.8%.

Last updated at: 2026-10-19

Compared models

Rank
#231
Total Output Tokens
193,676
Response Time (avg)
7.62s
Total Cost
$0.044
Rank
#236
Total Output Tokens
232,542
Response Time (avg)
44.53s
Total Cost
$0.989
Recommended model Mercury 2.5 (high)

It has the best score here (6.5), while costing about 22.8x 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 6.5 6.5
Rank #231 #236
Reliability 9.8 10.0
Consistency 8.7 8.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 59.4% 63.8%
Flaky tests 4 5
Total Runs 69 69
Cost per result 0.362 8.235
Total Cost $0.044 $0.989
Input Price $0.040 / 1M $1.250 / 1M
Output Price $0.150 / 1M $2.500 / 1M
Cache Read Price $0.004 / 1M $0.200 / 1M
Cache Write Price N/A N/A
Total Input Tokens 358,562 325,471
Output Tokens 4,266 14,867
Reasoning Tokens 189,410 217,675
Response Time (avg) 7.62s 44.53s
Response Time (max) 80.30s 216.69s
Response Time (total) 175.36s 1024.25s
Parameters ~100B ~1.5T total (~150B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#231 Mercury 2.5

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

#236 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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