Compare/Step 3.7 Flash vs gpt-oss-120b (high)

Step 3.7 Flashvsgpt-oss-120b (high)

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

StepFun

Step 3.7 Flash

Input
$0/M
Output
$0/M
Speed
TTFT
OpenAI

gpt-oss-120b (high)

Input
$0.15/M
Output
$0.6/M
Speed
406 tok/s
TTFT
0.51s

Winner by Category

Cheaper
Step 3.7 Flash
Faster (tok/s)
gpt-oss-120b (high)
Lower Latency
Step 3.7 Flash
Benchmarks (6-5)
Step 3.7 Flash

Pricing Comparison

MetricStep 3.7 Flashgpt-oss-120b (high)
Input ($/M tokens)$0$0.15
Output ($/M tokens)$0$0.6
Cost for 1M input + 100K output tokens:
Step 3.7 Flash$0.00
gpt-oss-120b (high)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
Step 3.7 Flash
gpt-oss-120b (high)
406 tok/s
Time to First Token (seconds) — lower is better
Step 3.7 Flash
gpt-oss-120b (high)
0.51s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
42.633.3
Coding Index
37.128.6
Math Index
93.4
GPQA Diamond
80.9%78.2%
MMLU-Pro
80.8%
LiveCodeBench
87.8%
AIME 2025
93.4%
MATH-500
Humanity's Last Exam
19.9%18.5%
SciCode
40.0%38.9%
IFBench
67.3%69.0%
TerminalBench
35.6%23.5%
Step 3.7 Flash6 wins
5 winsgpt-oss-120b (high)

Frequently Asked Questions

Which is cheaper, Step 3.7 Flash or gpt-oss-120b (high)?

Step 3.7 Flash is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.26/M for gpt-oss-120b (high).

Which model performs better on benchmarks?

Step 3.7 Flash wins 6 out of 12 benchmarks compared to 5 for gpt-oss-120b (high). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120b (high) generates tokens faster at 406 tok/s vs 0 tok/s. Step 3.7 Flash also has lower time-to-first-token (0.00s vs 0.51s).

When should I use Step 3.7 Flash vs gpt-oss-120b (high)?

Choose based on your priorities: Step 3.7 Flash for lower cost, Step 3.7 Flash for stronger benchmark performance, and gpt-oss-120b (high) for faster generation. For latency-sensitive apps, check the TTFT comparison above.