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Mistral: Mistral Small 4 vs MoonshotAI: Kimi K2.5

Summary

Mistral Small 4 vs Kimi K2.5 benchmark comparison: Kimi K2.5 leads on average score with 5.5 vs 5.1. Kimi K2.5 has the lower benchmark cost at $0.028 vs $0.068. Mistral Small 4 is faster at 9.40s vs 13.18s, with pass rates of 44.4% vs 34.9%.

Recommended model: Kimi K2.5 - It has the best score here (5.5), while costing about 2.5x less than Mistral Small 4.

Last updated at: 2026-06-12

Metric Mistral Small 4 Mistral Small 4 medium Release: 2026-03-16 Kimi K2.5 Kimi K2.5 none Release: 2026-01-27
Score 5.1 5.5
Rank #138 #121
Reliability 10.0 10.0
Consistency 6.9 8.9
Tests Correct
Attempt pass rate 44.4% 34.9%
Flaky tests 8 3
Total Runs 63 63
Cost per result 1.344 0.442
Total Cost $0.068 $0.028
Input Price $0.150 / 1M $0.400 / 1M
Output Price $0.600 / 1M $1.900 / 1M
Total Input Tokens 42,576 36,034
Output Tokens 24,184 6,657
Reasoning Tokens 84,678 0
Response Time (avg) 9.40s 13.18s
Response Time (max) 59.15s 42.13s
Response Time (total) 197.39s 184.47s

Generation showcase

Hamster playing table tennis

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

#138 Mistral Small 4

medium
Cost
$0.006
Time
47.9s
Tokens
9,857 tok

#121 MoonshotAI: Kimi K2.5

none
Cost
$0.015
Time
89.1s
Tokens
5,421 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 5.6 3.8 66.7% 3 2.67s 708 4,055 4,778
Kimi K2.5 3.6 8.4 8.3% 1 6.24s 652 373 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 4.4 5.1 33.3% 2 39.98s 7,636 11,635 54,715
Kimi K2.5 5.5 10.0 33.3% 0 24.56s 7,311 4,708 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 3.0 10.0 0.0% 0 25.25s 18,706 2,612 10,700
Kimi K2.5 2.8 2.1 33.3% 1 19.16s 12,264 748 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 7.3 5.9 83.3% 1 1.23s 6,171 335 723
Kimi K2.5 7.3 5.8 83.3% 1 42.13s 7,180 187 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 5.3 7.2 44.4% 1 6.11s 742 2,621 6,904
Kimi K2.5 5.3 10.0 33.3% 0 4.38s 753 29 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 4.8 10.0 0.0% 0 2.05s 519 821 828
Kimi K2.5 10.0 10.0 100.0% 0 4.00s 483 76 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 7.3 5.8 83.3% 1 1.38s 729 540 1,031
Kimi K2.5 6.5 10.0 50.0% 0 2.67s 677 60 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 3.4 9.7 0.0% 0 2.17s 735 1,226 2,632
Kimi K2.5 3.0 10.0 0.0% 0 4.04s 667 236 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 10.0 10.0 100.0% 0 3.50s 6,420 321 810
Kimi K2.5 10.0 10.0 100.0% 0 13.99s 5,835 220 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mistral Small 4 3.0 10.0 0.0% 0 5.92s 210 18 1,557
Kimi K2.5 3.0 10.0 0.0% 0 3.90s 212 20 0

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