Compare/Solar Pro 2 (Reasoning) vs gpt-oss-20B (low)

Solar Pro 2 (Reasoning)vsgpt-oss-20B (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-20B (low)

Input
$0.06/M
Output
$0.2/M
Speed
265 tok/s
TTFT
0.42s

Winner by Category

Cheaper
Solar Pro 2 (Reasoning)
Faster (tok/s)
gpt-oss-20B (low)
Lower Latency
Solar Pro 2 (Reasoning)
Benchmarks (4-8)
gpt-oss-20B (low)

Pricing Comparison

MetricSolar Pro 2 (Reasoning)gpt-oss-20B (low)
Input ($/M tokens)$0$0.06
Output ($/M tokens)$0$0.2
Cost for 1M input + 100K output tokens:
Solar Pro 2 (Reasoning)$0.00
gpt-oss-20B (low)$0.08

Speed Comparison

Output Speed (tokens/s) — higher is better
Solar Pro 2 (Reasoning)
gpt-oss-20B (low)
265 tok/s
Time to First Token (seconds) — lower is better
Solar Pro 2 (Reasoning)
gpt-oss-20B (low)
0.42s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
14.920.8
Coding Index
12.114.4
Math Index
61.362.3
GPQA Diamond
68.7%61.1%
MMLU-Pro
80.5%71.8%
LiveCodeBench
61.6%65.2%
AIME 2025
61.3%62.3%
MATH-500
96.7%
Humanity's Last Exam
7.0%5.1%
SciCode
30.2%34.0%
IFBench
37.1%57.8%
TerminalBench
3.0%4.5%
Solar Pro 2 (Reasoning)4 wins
8 winsgpt-oss-20B (low)

Frequently Asked Questions

Which is cheaper, Solar Pro 2 (Reasoning) or gpt-oss-20B (low)?

Solar Pro 2 (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.10/M for gpt-oss-20B (low).

Which model performs better on benchmarks?

gpt-oss-20B (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-20B (low) generates tokens faster at 265 tok/s vs 0 tok/s. Solar Pro 2 (Reasoning) also has lower time-to-first-token (0.00s vs 0.42s).

When should I use Solar Pro 2 (Reasoning) vs gpt-oss-20B (low)?

Choose based on your priorities: Solar Pro 2 (Reasoning) for lower cost, gpt-oss-20B (low) for stronger benchmark performance, and gpt-oss-20B (low) for faster generation. For latency-sensitive apps, check the TTFT comparison above.