Compare/Mistral Small 3 vs Step 3.5 Flash 2603

Mistral Small 3vsStep 3.5 Flash 2603

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

Mistral

Mistral Small 3

Input
$0.1/M
Output
$0.3/M
Speed
157 tok/s
TTFT
0.53s
StepFun

Step 3.5 Flash 2603

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

Winner by Category

Cheaper
Tie
Faster (tok/s)
Step 3.5 Flash 2603
Lower Latency
Mistral Small 3
Benchmarks (5-6)
Step 3.5 Flash 2603

Pricing Comparison

MetricMistral Small 3Step 3.5 Flash 2603
Input ($/M tokens)$0.1$0.1
Output ($/M tokens)$0.3$0.3
Cost for 1M input + 100K output tokens:
Mistral Small 3$0.13
Step 3.5 Flash 2603$0.13

Speed Comparison

Output Speed (tokens/s) — higher is better
Mistral Small 3
157 tok/s
Step 3.5 Flash 2603
180 tok/s
Time to First Token (seconds) — lower is better
Mistral Small 3
0.53s
Step 3.5 Flash 2603
0.92s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
6.926.0
Coding Index
Math Index
4.3
GPQA Diamond
46.2%82.6%
MMLU-Pro
65.2%
LiveCodeBench
25.2%
AIME 2025
4.3%
MATH-500
71.5%
Humanity's Last Exam
4.1%22.6%
SciCode
23.6%38.5%
IFBench
26.4%66.5%
TerminalBench
32.6%
Mistral Small 35 wins
6 winsStep 3.5 Flash 2603

Frequently Asked Questions

Which is cheaper, Mistral Small 3 or Step 3.5 Flash 2603?

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 6 out of 12 benchmarks compared to 5 for Mistral Small 3. 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 157 tok/s. Mistral Small 3 also has lower time-to-first-token (0.53s vs 0.92s).

When should I use Mistral Small 3 vs Step 3.5 Flash 2603?

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.