Compare/Step 3.7 Flash vs KAT Coder Pro V2

Step 3.7 FlashvsKAT Coder Pro V2

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
388 tok/s
TTFT
0.71s
KwaiKAT

KAT Coder Pro V2

Input
$0.3/M
Output
$1.2/M
Speed
TTFT

Winner by Category

Cheaper
Step 3.7 Flash
Faster (tok/s)
Step 3.7 Flash
Lower Latency
KAT Coder Pro V2
Benchmarks (3-4)
KAT Coder Pro V2

Pricing Comparison

MetricStep 3.7 FlashKAT Coder Pro V2
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 V2$0.42

Speed Comparison

Output Speed (tokens/s) — higher is better
Step 3.7 Flash
388 tok/s
KAT Coder Pro V2
Time to First Token (seconds) — lower is better
Step 3.7 Flash
0.71s
KAT Coder Pro V2

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
30.333.7
Coding Index
39.659.5
Math Index
GPQA Diamond
80.9%85.5%
MMLU-Pro
LiveCodeBench
AIME 2025
MATH-500
Humanity's Last Exam
19.9%16.0%
SciCode
40.0%38.3%
IFBench
67.3%66.7%
TerminalBench
35.6%49.2%
Step 3.7 Flash3 wins
4 winsKAT Coder Pro V2

Frequently Asked Questions

Which is cheaper, Step 3.7 Flash or KAT Coder Pro V2?

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 V2.

Which model performs better on benchmarks?

KAT Coder Pro V2 wins 4 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 388 tok/s vs 0 tok/s. However, KAT Coder Pro V2 has lower time-to-first-token (0.00s vs 0.71s).

When should I use Step 3.7 Flash vs KAT Coder Pro V2?

Choose based on your priorities: Step 3.7 Flash for lower cost, KAT Coder Pro V2 for stronger benchmark performance, and Step 3.7 Flash for faster generation. For latency-sensitive apps, check the TTFT comparison above.