Compare/Step 3.5 Flash 2603 vs Gemma 4 12B (Reasoning)

Step 3.5 Flash 2603vsGemma 4 12B (Reasoning)

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

StepFun

Step 3.5 Flash 2603

Input
$0.1/M
Output
$0.3/M
Speed
180 tok/s
TTFT
0.92s
Google

Gemma 4 12B (Reasoning)

Input
$0.1/M
Output
$0.3/M
Speed
143 tok/s
TTFT
1.33s

Winner by Category

Cheaper
Tie
Faster (tok/s)
Step 3.5 Flash 2603
Lower Latency
Step 3.5 Flash 2603
Benchmarks (5-1)
Step 3.5 Flash 2603

Pricing Comparison

MetricStep 3.5 Flash 2603Gemma 4 12B (Reasoning)
Input ($/M tokens)$0.1$0.1
Output ($/M tokens)$0.3$0.3
Cost for 1M input + 100K output tokens:
Step 3.5 Flash 2603$0.13
Gemma 4 12B (Reasoning)$0.13

Speed Comparison

Output Speed (tokens/s) — higher is better
Step 3.5 Flash 2603
180 tok/s
Gemma 4 12B (Reasoning)
143 tok/s
Time to First Token (seconds) — lower is better
Step 3.5 Flash 2603
0.92s
Gemma 4 12B (Reasoning)
1.33s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
26.022.0
Coding Index
Math Index
GPQA Diamond
82.6%75.3%
MMLU-Pro
LiveCodeBench
AIME 2025
MATH-500
Humanity's Last Exam
22.6%14.8%
SciCode
38.5%38.2%
IFBench
66.5%73.5%
TerminalBench
32.6%18.2%
Step 3.5 Flash 26035 wins
1 winsGemma 4 12B (Reasoning)

Frequently Asked Questions

Which is cheaper, Step 3.5 Flash 2603 or Gemma 4 12B (Reasoning)?

Both models have similar pricing. Check the detailed breakdown above for input vs output token costs.

Which model performs better on benchmarks?

Step 3.5 Flash 2603 wins 5 out of 12 benchmarks compared to 1 for Gemma 4 12B (Reasoning). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Step 3.5 Flash 2603 generates tokens faster at 180 tok/s vs 143 tok/s. Step 3.5 Flash 2603 also has lower time-to-first-token (0.92s vs 1.33s).

When should I use Step 3.5 Flash 2603 vs Gemma 4 12B (Reasoning)?

Choose based on your priorities: both are similarly priced, Step 3.5 Flash 2603 for stronger benchmark performance, and Step 3.5 Flash 2603 for faster generation. For latency-sensitive apps, check the TTFT comparison above.