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Anthropic: Claude Sonnet 4.6 vs StepFun: Step 3.7 Flash

Summary

Claude Sonnet 4.6 vs Step 3.7 Flash benchmark comparison: Claude Sonnet 4.6 leads on average score with 7.8 vs 7.1. Step 3.7 Flash has the lower benchmark cost at $1.148 vs $1.418. Claude Sonnet 4.6 is faster at 17.06s vs 64.46s, with pass rates of 65.1% vs 63.5%.

Recommended model: Claude Sonnet 4.6 - It has the best score here (7.8), while responding about 3.8x faster than Step 3.7 Flash.

Last updated at: 2026-07-02

Metric Claude Sonnet 4.6 Claude Sonnet 4.6 medium Release: 2026-02-17 Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29
Score 7.8 7.1
Rank #32 #65
Reliability 10.0 10.0
Consistency 9.1 8.2
Tests Correct
Attempt pass rate 65.1% 63.5%
Flaky tests 2 4
Total Runs 63 63
Cost per result 10.904 10.434
Total Cost $1.418 $1.148
Input Price $3.000 / 1M $0.200 / 1M
Output Price $15.000 / 1M $1.150 / 1M
Total Input Tokens 49,112 38,391
Output Tokens 54,703 991,355
Reasoning Tokens 29,970 0
Response Time (avg) 17.06s 64.46s
Response Time (max) 46.35s 364.99s
Response Time (total) 221.83s 1353.57s

Generation showcase

Hamster playing table tennis

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

#32 Claude Sonnet 4.6

medium
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

#65 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
Claude Sonnet 4.6 6.5 10.0 50.0% 0 2.98s 789 1,046 1,093
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
Claude Sonnet 4.6 5.7 6.6 44.4% 1 33.29s 6,995 16,089 3,686
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
Claude Sonnet 4.6 10.0 10.0 100.0% 0 46.35s 18,351 5,871 3,962
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
Claude Sonnet 4.6 10.0 10.0 100.0% 0 13.90s 8,676 649 742
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
Claude Sonnet 4.6 2.9 7.2 11.1% 1 0ms 471 25,790 16,919
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
Claude Sonnet 4.6 10.0 10.0 100.0% 0 4.94s 564 256 433
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
Claude Sonnet 4.6 10.0 10.0 100.0% 0 2.61s 792 318 552
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
Claude Sonnet 4.6 10.0 10.0 100.0% 0 5.31s 816 592 646
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
Claude Sonnet 4.6 10.0 10.0 100.0% 0 7.48s 11,454 655 351
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
Claude Sonnet 4.6 3.0 10.0 0.0% 0 30.09s 204 3,437 1,586
Step 3.7 Flash 3.0 10.0 0.0% 0 149.34s 222 147,476 0

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