GPT-5 Pro vs Solar Pro 3
OpenAI vs Upstage — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Pro has the higher intelligence index (88.4 vs 72.4)
- •Solar Pro 3 is cheaper ($0.15 vs $15.00 per 1M input)
- •GPT-5 Pro has a larger context window (400K)
| GPT-5 Pro | Solar Pro 3 | |
|---|---|---|
| Intelligence index | 88.4 | 72.4 |
| Developer | OpenAI | Upstage |
| Type | LLM | LLM |
| Access | API only | API only |
| Context window | 400,000 tokens | 128,000 tokens |
| Input price | $15.00 / 1M | $0.15 / 1M |
| Output price | $120.00 / 1M | $0.60 / 1M |
| Speed | — | — |
| Released | October 6, 2025 | January 27, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5 Pro
Solar Pro 3
GPQA Diamond
88.4
72.4
Humanity’s Last Exam
42
10.1