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MoonshotAI: Kimi K2.5 vs StepFun: Step 3.7 Flash

Summary

Kimi K2.5 vs Step 3.7 Flash benchmark comparison: Step 3.7 Flash leads on average score with 7.0 vs 6.8. Kimi K2.5 has the lower benchmark cost at $0.328 vs $1.148. Step 3.7 Flash is faster at 64.46s vs 98.43s, with pass rates of 68.3% vs 63.5%.

Recommended model: Kimi K2.5 - Its score stays close to the best score here (6.8 vs 7.0), while costing about 3.5x less than Step 3.7 Flash.

Last updated at: 2026-06-04

Metric Kimi K2.5 Kimi K2.5 medium Release: 2026-01-27 Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29
Score 6.8 7.0
Rank #76 #71
Reliability 10.0 10.0
Consistency 6.9 8.2
Tests Correct
Attempt pass rate 68.3% 63.5%
Flaky tests 8 4
Total Runs 63 63
Cost per result 3.704 10.434
Total Cost $0.328 $1.148
Input Price $0.400 / 1M $0.200 / 1M
Output Price $1.900 / 1M $1.150 / 1M
Total Input Tokens 34,312 38,391
Output Tokens 48,379 991,355
Reasoning Tokens 157,747 0
Response Time (avg) 98.43s 64.46s
Response Time (max) 281.00s 364.99s
Response Time (total) 1378.03s 1353.57s

Generation showcase

Hamster playing table tennis

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

#76 MoonshotAI: Kimi K2.5

medium
Cost
$0.030
Time
58.6s
Tokens
8,683 tok

#71 Step 3.7 Flash

high
Cost
$0.007
Time
63.6s
Tokens
6,030 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
Kimi K2.5 7.3 5.8 83.3% 2 51.38s 634 2,789 8,880
Step 3.7 Flash 10.0 10.0 100.0% 0 13.40s 696 42,656 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 6.1 4.6 66.7% 2 217.49s 6,935 5,705 74,693
Step 3.7 Flash 4.0 6.0 22.2% 1 206.21s 6,057 327,340 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 71.37s 11,280 703 3,713
Step 3.7 Flash 10.0 10.0 100.0% 0 13.01s 13,638 8,802 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 49.78s 7,020 563 7,940
Step 3.7 Flash 10.0 10.0 100.0% 0 14.72s 7,368 23,113 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 3.5 4.4 33.3% 2 137.29s 485 20,753 30,564
Step 3.7 Flash 4.1 4.4 44.5% 2 149.64s 783 410,502 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 6.5 3.4 66.7% 1 69.73s 480 3,815 4,262
Step 3.7 Flash 5.5 10.0 0.0% 0 4.17s 510 2,862 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 92.47s 675 5,371 6,547
Step 3.7 Flash 9.8 10.0 100.0% 0 1.52s 705 2,010 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 5.3 7.3 44.4% 1 43.23s 659 8,426 12,692
Step 3.7 Flash 5.3 7.2 44.4% 1 10.22s 711 25,422 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 31.74s 5,933 242 812
Step 3.7 Flash 10.0 10.0 100.0% 0 2.79s 7,701 1,172 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 3.0 10.0 0.0% 0 83.95s 211 12 7,644
Step 3.7 Flash 3.0 10.0 0.0% 0 149.34s 222 147,476 0

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