Compare/Solar Pro 2 (Reasoning) vs gpt-oss-120B (low)

Solar Pro 2 (Reasoning)vsgpt-oss-120B (low)

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

Upstage

Solar Pro 2 (Reasoning)

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

gpt-oss-120B (low)

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

Winner by Category

Cheaper
Solar Pro 2 (Reasoning)
Faster (tok/s)
gpt-oss-120B (low)
Lower Latency
Solar Pro 2 (Reasoning)
Benchmarks (4-8)
gpt-oss-120B (low)

Pricing Comparison

MetricSolar Pro 2 (Reasoning)gpt-oss-120B (low)
Input ($/M tokens)$0$0.15
Output ($/M tokens)$0$0.6
Cost for 1M input + 100K output tokens:
Solar Pro 2 (Reasoning)$0.00
gpt-oss-120B (low)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
Solar Pro 2 (Reasoning)
gpt-oss-120B (low)
255 tok/s
Time to First Token (seconds) — lower is better
Solar Pro 2 (Reasoning)
gpt-oss-120B (low)
0.51s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
14.924.5
Coding Index
12.115.5
Math Index
61.366.7
GPQA Diamond
68.7%67.2%
MMLU-Pro
80.5%77.5%
LiveCodeBench
61.6%70.7%
AIME 2025
61.3%66.7%
MATH-500
96.7%
Humanity's Last Exam
7.0%5.2%
SciCode
30.2%36.0%
IFBench
37.1%58.3%
TerminalBench
3.0%5.3%
Solar Pro 2 (Reasoning)4 wins
8 winsgpt-oss-120B (low)

Frequently Asked Questions

Which is cheaper, Solar Pro 2 (Reasoning) or gpt-oss-120B (low)?

Solar Pro 2 (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.26/M for gpt-oss-120B (low).

Which model performs better on benchmarks?

gpt-oss-120B (low) wins 8 out of 12 benchmarks compared to 4 for Solar Pro 2 (Reasoning). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120B (low) generates tokens faster at 255 tok/s vs 0 tok/s. Solar Pro 2 (Reasoning) also has lower time-to-first-token (0.00s vs 0.51s).

When should I use Solar Pro 2 (Reasoning) vs gpt-oss-120B (low)?

Choose based on your priorities: Solar Pro 2 (Reasoning) for lower cost, gpt-oss-120B (low) for stronger benchmark performance, and gpt-oss-120B (low) for faster generation. For latency-sensitive apps, check the TTFT comparison above.