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Mercury 2.5 Preview (low) vs Mistral Small 4 (medium)

Mistral Small 4 (medium) leads on average score with 5.1 vs 5.0. Mercury 2.5 Preview (low) has the lower benchmark cost at $0.015 vs $0.126. Mercury 2.5 Preview (low) is faster at 4.92s vs 12.68s, with pass rates of 44.9% vs 42.0%.

Last updated at: 2026-10-19

Compared models

Rank
#350
Total Output Tokens
36,870
Response Time (avg)
4.92s
Total Cost
$0.015
Rank
#343
Total Output Tokens
127,970
Response Time (avg)
12.68s
Total Cost
$0.126
Recommended model Mercury 2.5 Preview (low)

Its score stays close to the best score here (5.0 vs 5.1), while costing about 8.4x less than Mistral Small 4 (medium).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview low Release: 2026-09-02 Mistral Small 4 Mistral Small 4 medium Release: 2026-03-16
Score 5.0 5.1
Rank #350 #343
Reliability 9.9 9.7
Consistency 7.1 7.1
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 44.9% 42.0%
Flaky tests 8 8
Total Runs 69 69
Cost per result 0.244 2.502
Total Cost $0.015 $0.126
Input Price $0.040 / 1M $0.150 / 1M
Output Price $0.150 / 1M $0.600 / 1M
Cache Read Price N/A $0.015 / 1M
Cache Write Price N/A N/A
Total Input Tokens 235,438 321,955
Output Tokens 8,136 41,555
Reasoning Tokens 28,734 94,946
Response Time (avg) 4.92s 12.68s
Response Time (max) 84.47s 59.15s
Response Time (total) 113.24s 291.66s
Parameters ~100B 119B total (6B active)
Availability Closed Open source

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.

#350 Mercury 2.5 Preview

low
Cost
$0.001
Time
1.5s
Tokens
1,169 tok

#343 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 5.5 10.0 33.3% 0 972ms 7,794 695 2,263
Mistral Small 4 4.4 5.1 33.3% 2 39.98s 7,636 11,635 54,715

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