Compare/Step 3.7 Flash vs KAT-Coder-Pro V1

Step 3.7 FlashvsKAT-Coder-Pro V1

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

StepFun

Step 3.7 Flash

Input
$0.2/M
Output
$1.15/M
Speed
393 tok/s
TTFT
0.75s
KwaiKAT

KAT-Coder-Pro V1

Input
$0.3/M
Output
$1.2/M
Speed
104 tok/s
TTFT
1.03s

Winner by Category

Cheaper
Step 3.7 Flash
Faster (tok/s)
Step 3.7 Flash
Lower Latency
Step 3.7 Flash
Benchmarks (3-8)
KAT-Coder-Pro V1

Pricing Comparison

MetricStep 3.7 FlashKAT-Coder-Pro V1
Input ($/M tokens)$0.2$0.3
Output ($/M tokens)$1.15$1.2
Cost for 1M input + 100K output tokens:
Step 3.7 Flash$0.32
KAT-Coder-Pro V1$0.42

Speed Comparison

Output Speed (tokens/s) — higher is better
Step 3.7 Flash
393 tok/s
KAT-Coder-Pro V1
104 tok/s
Time to First Token (seconds) — lower is better
Step 3.7 Flash
0.75s
KAT-Coder-Pro V1
1.03s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
29.734.6
Coding Index
37.358.9
Math Index
94.7
GPQA Diamond
80.9%76.4%
MMLU-Pro
81.3%
LiveCodeBench
74.7%
AIME 2025
94.7%
MATH-500
Humanity's Last Exam
19.9%33.4%
SciCode
40.0%36.6%
IFBench
67.3%68.4%
TerminalBench
35.6%9.1%
Step 3.7 Flash3 wins
8 winsKAT-Coder-Pro V1

Frequently Asked Questions

Which is cheaper, Step 3.7 Flash or KAT-Coder-Pro V1?

Step 3.7 Flash is cheaper overall. Its blended price (3:1 input/output ratio) is $0.44/M tokens vs $0.53/M for KAT-Coder-Pro V1.

Which model performs better on benchmarks?

KAT-Coder-Pro V1 wins 8 out of 12 benchmarks compared to 3 for Step 3.7 Flash. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Step 3.7 Flash generates tokens faster at 393 tok/s vs 104 tok/s. Step 3.7 Flash also has lower time-to-first-token (0.75s vs 1.03s).

When should I use Step 3.7 Flash vs KAT-Coder-Pro V1?

Choose based on your priorities: Step 3.7 Flash for lower cost, KAT-Coder-Pro V1 for stronger benchmark performance, and Step 3.7 Flash for faster generation. For latency-sensitive apps, check the TTFT comparison above.