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Mercury 2.5 Preview vs Mistral Small 4 (medium)

Mistral Small 4 (medium) leads on average score with 5.1 vs 4.9. Mercury 2.5 Preview has the lower benchmark cost at $0.018 vs $0.097. Mercury 2.5 Preview is faster at 3.51s vs 10.80s, with pass rates of 30.3% vs 43.9%.

Last updated at: 2026-09-02

Rank
#259
Total Output Tokens
82,585
Response Time (avg)
3.51s
Total Cost
$0.018
Rank
#246
Total Output Tokens
133,597
Response Time (avg)
10.80s
Total Cost
$0.097
Recommended model Mercury 2.5 Preview

Its score stays close to the best score here (4.9 vs 5.1), while costing about 5.5x less than Mistral Small 4 (medium).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview none Release: 2026-09-02 Mistral Small 4 Mistral Small 4 medium Release: 2026-03-16
Score 4.9 5.1
Rank #259 #246
Reliability 10.0 10.0
Consistency 8.3 7.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 30.3% 43.9%
Flaky tests 5 8
Total Runs 66 66
Cost per result 0.440 1.923
Total Cost $0.018 $0.097
Input Price $0.040 / 1M $0.150 / 1M
Output Price $0.150 / 1M $0.600 / 1M
Total Input Tokens 130,296 140,559
Output Tokens 82,585 40,268
Reasoning Tokens 0 93,329
Response Time (avg) 3.51s 10.80s
Response Time (max) 60.70s 59.15s
Response Time (total) 77.28s 237.60s
Parameters ~100B 119B total (6B active)
Availability Closed Open source

Model generation showcase

Hamster playing table tennis

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

#259 Mercury 2.5 Preview

none
Invalid SVG
Cost
$0.001
Time
3.3s
Tokens
3,122 tok

#246 Mistral Small 4

medium
Cost
$0.006
Time
47.9s
Tokens
9,857 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 Preview 4.7 7.9 22.2% 1 459ms 7,850 650 0
Mistral Small 4 4.4 5.1 33.3% 2 39.98s 7,636 11,635 54,715

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